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