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