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