Here's what rhymes with opithecus.
Words that almost rhyme with opithecus
tinnitus bigamous synthesis diligence antithesis silicates syllabus umbilicus minimised villainous epitomised vertiginous epitomise indigenous stimulus vigilance wickedness cheerfulness dissonance limitless mischievous virulence littleness minuteness polygamous brittleness fickleness symbolise legitimised victimised stigmatise cheerlessness ridiculous filaments frivolous ligaments meticulous omnipotence synchronous articulates chivalrous dissidents militants sinfulness vividness fearlessness singleness sycophants wilfulness fearfulness legitimates nimbleness willfulness litigiousness winsomeness fitfulness witlessness timpanists ambivalence stimulants unambiguous asynchronous solicitous felicitous gingivitis particulates peristalsis listlessness religiousness visitants wistfulness shiftlessness ambitiousness blissfulness equivocates skillfulness assiduousness cymbalists participants equivalence abolitionists religionists coreligionists predicaments precipitants geosynchronous grandiloquence gesticulates individuates ministrants nutritiousness surreptitiousness equivalents magnificence traditionalists infelicitous repetitiousness conjunctivitis imprisonments prohibitionists exhibitionists coalitionists expeditiousness nonparticipants nonequivalents