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