Here's what rhymes with comparatives.
imperatives Words that almost rhyme with comparatives
relatives genitives negatives sedatives contemplatives sensitives menaces penances reckonings decilitres executives censuses crevices necklaces plexuses presences crevasses hairbrushes nexuses consensuses preventatives conspectuses leopardesses necklacings shellackings monetises apprentices questionings quintessences negliges demonetises representatives acceptances prospectuses adolescences millionairesses assemblages remembrances convalescences