-tree c-cor c-tec ccccc ccett ceco- ceere ceoce ceoor cerc- cerce cerco cerec cerer ceret cero- ceroc cerou cerre cerro certe ceto- cette co-co cocc- cocce cocco coceo cocto cocur coete coeur cooee cooer coore coote corce core- coree corer coreu corex coro- corot corre corte corto coter cott- cotte cotto cottu couco couer coure court couru couto coutu crece creer creo- creot crete cretu creu- creue creux croce croco crooe croot crore crote crott crout cruce cruet cruex cruor crure ctree cttee cuero cueto cuoco cuore curce curer curet curre curro curto cutco cutcu cutee cuter cutex cutro cutto ecto- ector ectot eeeee eorre erect erere eroor erore eroto error errtu erte erter eruct etete etext etoro etour etree etter eturu eucre eurex euro- eurre excur exect execx exert exore exort exout exter extre extro extue exute occur ocoee ocote ocree octet octo- octor oeco- oo-er oocre ooooo orcet oreco oreo- orere orero orexo oroco oroer orout oroux orret orter ortet ortoo oruce oruro orutu otere otero otoce ototo otour otter ottur oture ouert ouoro ource oure- outer outre outro outto oxter r-co- recce recco recet rect- recte recto recue recur recut reece reere reorx rere- reree reret retee reter retex retox retro rette retto reuer reuet reute rexer ro-ro rocco rocor rocou roero roeux rooer roore roote rooue rorer roter roto- rotor rotot rotox rotte rotto rouer rouet roure route routt rtext rucer ruere ruete rurec ruter rutte ruutu t-rex tecou teoco terce terco teret tereu terex teror terre terro tert- teruo teter tetex tetr- tetro tette teuto texor texte tocco toco- tocut toece toerr toeto toore torce toreo toret torre torro torte torto tortu torue torxe toter totex toto- totoe totoo totte toure touro toute toxo- treco treer treet trere trete trett treut treux troco troee trott troue trout truce truco truer truex truro trute truxe ttttt tucet tuctu tuero tuotu turco turet turoc turot turre turro turtu turut tutee tuteo tutor tutte tutto tuuru u-cee ucero uouee ureo- urour urter uruce urucu urutu uter- utero utro- utror utter uttur uturu ututo uuuuu x-out xero- xerox xerte xetec xetex xexeu xexex xootr xorro xotox xoxox xtext xtort xtree