chuchu chummy chumps chumpy chushu chutty cppcms cuscus cushty custum cut-up cutchy cutcut cutsup cutups cutupu cyttus huh-uh humhum hummum hummus humphs humpty humusy hushup hushut huthut hutsut hy-spy hyppus mm-hmm muccus muchuu mucusy muhuhu musmus mussum mussup mutuum muumuu mymymy mystus mythus pppppp ppsspp psych- psychs ptych- pumpup pupput pushtu pushup put-up putput putsch putsup putups schtum schuch schupp schuss schuyt scummy scutch scutty scutum scutus scyph- shmups shshsh shtums shtups shusht shutup smushy smutch smutty smyths sputum sttstc stummy stumps stumpy stussy stythy succus suhut sum-up summum summut sumphs sumsup susumu sympus syphus thumps thumpy thymus tuchus tumphy tumtum tuttut typhus uh-huh uhhuhs um-hum umuchu up-cut up-put upshut upsssc ustupu yumyum