Here's what rhymes with quinquivalent.
equivalent ambivalent nonequivalent Words that almost rhyme with quinquivalent
vigilant virulent filament ligament militant littlest sycophant nimblest ficklest coincident silicate simulate stimulant dissonant visitant medicament nonvirulent cheerfullest difficult magnificent omnipotent discriminant empiricist militarist belittlement ministrant nonmilitant timpanist legitimate imprisonment particulate predicament inarticulate precipitant individuate dissimulate participant indiscriminate grandiloquent gesticulate coalitionist abolitionist exhibitionist nonparticipant prohibitionist