Here's what rhymes with opinionative.
native dative emulative innovative imitative nonnative stimulative creative integrative iterative educative meditative radiative dissipative regulative denotative annotative legislative authoritative qualitative associative evaluative oxidative vegetative deliberative manipulative dissociative evaporative accumulative connotative copulative administrative cooperative collaborative appreciative interpretative investigative rehabilitative procreative cogitative quantitative unappreciative nonadministrative Words that almost rhyme with opinionative
cages sages rages mutatis phages wadis wadges engages bellyaches reengages macrophages disengages greengages invasive pervasive abrasive evasive plaintive persuasive noninvasive unpersuasive dissuasive nonabrasive