Here's what rhymes with petitionist.
abolitionist prohibitionist exhibitionist coalitionist Words that almost rhyme with petitionist
timpanist dissonant littlest nimblest cheerfullest ficklest difficult militant particulate silicate vigilant virulent empiricist militarist sycophant legitimate participant filament ligament ambivalent omnipotent simulate stimulant visitant coincident predicament discriminant precipitant individuate medicament dissimulate gesticulate belittlement ministrant nonvirulent nonmilitant equivalent magnificent imprisonment inarticulate grandiloquent indiscriminate nonequivalent nonparticipant