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