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