Here's what rhymes with unregressed.
rest lest crest wrest best test west breast chest arrest blessed dressed guest pressed nest quest guessed jest pest vest zest blest caressed addressed request stressed assessed oppressed progressed repressed unrest abreast attest expressed suggest possessed depressed impressed compressed confessed invest professed suppressed bequest digest obsessed acquiesced behest detest divest undressed manifest northwest distressed southwest dispossessed Words that almost rhyme with unregressed
left cleft theft deft weft refreshed bereft enmeshed yet let rent lent crept leaped wrecked leapt get next set went cent felt kept met sent correct meant text debt net threat belt bent checked collect dealt regret slept wet bet elect erect jet melt sect tent knelt pet recollect scent sensed vent wept clenched dreamt fetched flexed vexed decked dent fenced fret necked pent vet wrenched against effect direct except accept event spent affect helped reflect select commenced neglect reject stepped stretched swept accent assent cigarette connect sweat ascent dwelt lament repent sketched adept augment cassette drenched quenched resent reset tempt cadet duet inept orient shipwrecked smelt spelt extent percent respect attempt expect perfect prevent represent consent forget protect descent detect intellect intent cement dialect exempt incorrect offset upset beset condensed dissent entrenched invent epithet ferment perplexed beget deflect infect inject pipette preset quartet redirect unchecked subject president contempt indirect suspect architect alphabet inspect retrospect underwent bayonet dispensed intercept intersect outstretched parapet clarinet silhouette transept circumvent disconnect disrespect discontent circumspect