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