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