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