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