Here's what rhymes with unflatten.
flatten latin satin fatten batten platen Words that almost rhyme with unflatten
happen hadn cabin stratum datum haben gladden sadden madden imagine madam madame substratum macadam tarmacadam ration lation slacken flagon fashion passion captain fraction barren cannon canon famine wagon dragon gallon salmon baron fasten canton blacken bracken plantain tation flaxen mammon talon unfasten gammon flashgun raglan reaction faction chaplain mansion traction assassin canyon bastion caption falcon plankton saffron stallion dampen hangman infraction jasmine madmen taxon waxen zooplankton banyan capstan chanson batsman refashion scansion scallion damson klaxon trashcan badman badmen gasman refasten abandon attraction abstraction compassion contraction grandson sanction diffraction refraction craftsman inaction prolactin draftsman draughtsman medallion redaction adaption clansmen contraption draftsmen handgun dispassion landsman clansman gravamen triathlon taxman taxmen sandmen expansion interaction companion transaction extraction battalion distraction retraction subtraction compaction phytoplankton exaction impaction reexamine detraction diapason overreaction upperclassman bandsman gyrfalcon underclassman malefaction rarefaction benefaction counteraction stupefaction protraction pentathlon rapscallion vitrifaction satisfaction liquefaction petrifaction dissatisfaction putrefaction