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