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