Other possible rhymes for obsoletion
                            cross-action
                                cross-classification
                                cross-collateralization
                                cross-conjugation
                                cross-contamination
                                cross-correlation
                                cross-examination
                                cross-fertilisation
                                cross-fertilization
                                cross-infection
                                cross-multiplication
                                cross-pollination
                                cross-presentation
                                cross-promotion
                                cross-question
                                cross-registration
                                cross-section
                                cross-validation
                                crossan
                                crosscorrelation
                                crosseamination
                                crossen
                                crossexamination
                                crossmultiplication
                                crosson
                                crossquestion
                                crossreaction
                                crosssection
                                crosstabulation
                                croton-on-hudson
                                crotononhudson
                                crotonylation
                                crotylation
                                crotylboration
                                crouchen
                                crouy-sur-cosson
                                crownation
                                crownofcreation
                                crowson
                                cruachan
                                crucession
                                crucian
                                cruciation
                                crucifiction
                                crucifixion
                                crucifixtion
                                crudefaction
                                crudification
                                cruentation
                                cruithnechan
                                crustacean
                                crustation
                                crustification
                                cryforattention
                                cryo-adsorption
                                cryo-transmission
                                cryoconcentration
                                cryocondensation
                                cryoextraction
                                cryofixation
                                cryoimmobilization
                                cryoneuromodulation
                                cryoplanation
                                cryoprecipitation
                                cryopreservation
                                cryoprotection
                                cryosection
                                cryosequestration
                                cryosorption
                                cryosuction
                                cryosuspension
                                cryotransmission
                                cryoturbation
                                cryptochristian
                                cryptodepression
                                cryptofiction
                                crysan
                                crystalisation
                                crystallisation
                                crystallization
                                crystian
                                csection
                                cuautinchan
                                cubanrevolution
                                cubation
                                cubomedusan
                                cucainization
                                culberson
                                culbertson
                                cullison
                                culmination
                                cultellation
                                cultivation
                                culturalization
                                culturalrevolution
                                culturation
                                cumacean
                                cumulation
                                cunctation
                                cungsan
                                cunnilinction
                                cuoshen
                                cupellation
                                cupidcometvixen
                                cupration
                                cupressacean
                                curarization
                                curation
                                cursan
                                cursecorrection
                                cursen
                                cursitation
                                curson
                                curtation
                                curvation
                                cushan
                                cushion
                                cuspidation
                                cussan
                                cussen
                                cussey-sur-lison
                                cusson
                                customerization
                                customisation
                                customization
                                cutesification
                                cuthbertson
                                cuticularization
                                cutification
                                cutinization
                                cutireaction
                                cutization
                                cyanation
                                cyanidation
                                cyanoethylation
                                cyanolichen
                                cyanophosphorylation
                                cyanosilylation
                                cyber-collection
                                cyberaddiction
                                cyberauction
                                cyberbalkanization
                                cybercommunication
                                cyberconversation
                                cybercorporation
                                cyberdefamation
                                cyberdisinhibition
                                cybereducation
                                cyberextension
                                cyberextortion
                                cyberfashion
                                cyberfiction
                                cybergeneration
                                cyberinformation
                                cyberinteraction
                                cyberisation
                                cyberization
                                cybermedicine
                                cybernation
                                cybernavigation
                                cybernetician
                                cyberprostitution
                                cyberrevolution
                                cyborgization
                                cycasin
                                cyclisation
                                cyclization
                                cycloaddition
                                cyclobutannulation
                                cyclodehydration
                                cyclodehydrogenation
                                cyclodimerization
                                cycloelimination
                                cyclofunctionalization
                                cycloheptannulation
                                cyclohexannulation
                                cycloisomerisation
                                cycloisomerization
                                cyclomerization
                                cyclometalation
                                cyclometallation
                                cyclooctannulation
                                cyclopalladation
                                cyclopentannulation
                                cyclopolymerization
                                cyclopropanation
                                cyclopropannulation
                                cycloreversion
                                cyclotetramerization
                                cyclotrimerization
                                cylindricalization
                                cylindrification
                                cyrillisation
                                cyrillization
                                cyrtian
                                cytocentrifugation
                                cytochalasin
                                cytodifferentiation
                                cytoprotection
                                cytoreduction
                                cytotechnician
                                cytoxan
                                czechization
                                d'yrsan
                                d-formation
                                d-generation
                                d-mention
                                d/generation
                                dabson
                                dachchan
                                dachsen
                                dachsenhausen
                                dacian
                                daeamsan
                                daebawisan
                                daedeoksan
                                daedunsan
                                daegeumsan
                                daejeoncheon
                                daemisan
                                daeseongsan
                                daeunsan
                                daeyasan
                                daffynition
                                dagobertshausen
                                dagsavisen
                                dahlhausen
                                daijisen
                                dailymotion
                                daintification
                                dairysection
                                daisan
                                dakotajohnson
                                dalashan
                                dalcheon
                                dalfsen
                                dalimadison
                                dalingshan
                                dalison
                                dalkarlsan
                                dallison
                                dalmasan
                                dalmatian
                                dalmation
                                dalmtian
                                damasin
                                damassen
                                damastion
                                dame-nation
                                dameson
                                dammasin
                                damnation
                                damnation/salvation
                                damnification
                                dampnacion
                                dampson
                                damson
                                damysen
                                dancefloration
                                dancelesson
                                dancemeditation
                                dandification
                                dangerization
                                danielsen
                                danielson
                                danielsson
                                danitracen
                                dankmarshausen
                                danko/fjeld/andersen
                                dannyocean
                                dansen
                                danseoksan
                                danson
                                dantian
                                daorson
                                darakhshan
                                daraksan
                                darchen
                                darkeshan
                                darmishan
                                darnation
                                darneshan
                                darsan
                                darshan
                                darshen
                                dartian
                                darvishan
                                darxon
                                dashan
                                dashkasan
                                dashkesan
                                dashtian
                                dasycladacean
                                datacollection
                                datacorruption
                                datafication
                                datamation
                                datamotion
                                datangshan
                                datian
                                dation
                                dativization
                                datsan
                                dauermodification
                                dauermodifikation
                                dauwelshausen
                                davidjanssen
                                davidrobinson
                                davidsen
                                davidson
                                davidsson
                                davison
                                davisson
                                davson
                                davtashen
                                dawgnation
                                dawnson
                                dawson
                                daxiong
                                daycation
                                dayueshan
                                dayushan
                                dbmotion
                                ddaykration
                                ddmashen
                                de-accession
                                de-anonymization
                                de-articulation
                                de-ba'athification
                                de-baathification
                                de-categorialization
                                de-emanation
                                de-epoxidation
                                de-escalation
                                de-esterification
                                de-excitation
                                de-extinction
                                de-graduation
                                de-hellenization
                                de-identification
                                de-illumination
                                de-iodination
                                de-nastification
                                de-nazification
                                de-perimeterisation
                                de-sinicization
                                de-soekarnoization
                                de-stalinisation
                                de-stalinization
                                de-tension
                                deaccession
                                deaccumulation
                                deacetylation
                                deacidification
                                deacquisition
                                deaction
                                deactivation
                                deacylation
                                deadenylation
                                deadenylylation
                                deadtreeedition
                                deaeration
                                deafferentation
                                deaffrication
                                deagglomeration
                                deagrarianization
                                dealation
                                dealbation
                                dealkalization
                                dealkylation
                                deallocation
                                dealumination
                                deambulation
                                deamidation
                                deamidization
                                deamination
                                deaminization
                                deanacheson
                                deanthropomorphisation
                                dearevanhansen
                                deargentation
                                dearomatization
                                deasphaltization
                                deaspiration
                                deassimilation
                                deathinvenison
                                deauration
                                debabelization
                                debacchation
                                debarcation
                                debarkation
                                debarration
                                debathification
                                debation
                                debbiegibson
                                debellation
                                debendification
                                debenzylation
                                debilitation
                                debismuthization
                                debituminization
                                deboronation
                                debpatterson
                                debravation
                                debrecen
                                debromination
                                debuccalization
                                debullition
                                debussian
                                debutanization
                                debutyration
                                decacumination
                                decadation
                                decaffeination
                                decaffeinisation
                                decaffeinization
                                decalcation
                                decalcification
                                decalfraction
                                decalvation
                                decanation
                                decannulation
                                decantation
                                decapacitation
                                decapitation
                                decapsulation
                                decarbonation
                                decarbonatization
                                decarbonization
                                decarbonylation
                                decarbopalladation
                                decarboxylation
                                decarburation
                                decarburization
                                decarnation
                                decartelization
                                decartellization
                                decasualization
                                decategorization
                                decatenation
                                decaudation
                                deceleration
                                decellularisation
                                decellularization
                                decension
                                decentalisation
                                decentralisation
                                decentralization
                                decentration
                                decephalization
                                deceptation
                                deception
                                decerebellation
                                decerebration
                                decerption
                                decertation
                                decertification
                                decession
                                dechantskirchen
                                dechlorination
                                dechristianization
                                decideson
                                decidualization
                                decimalfraction
                                decimalinfraction
                                decimalisation
                                decimalization
                                decimation
                                decipheration
                                declamation
                                declaration
                                declassification
                                declension
                                declination
                                decoction
                                decollation
                                decolonisation
                                decolonization
                                decoloration
                                decolorisation
                                decolorization
                                decolouration
                                decolourisation
                                decolourization
                                decommercialization
                                decommission
                                decommodification
                                decommunization
                                decompactification
                                decompaction
                                decompartmentalization
                                decompensation
                                decompilation
                                decomplementation
                                decomplexation
                                decomposition
                                decompression
                                deconcentration
                                decondensation
                                decondition