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