Colonialist rhymes with:
editorialist, imperialist, industrialist, materialist, anti-federalist, criminalist, cyclist, dualist, duelist, editorialist, environmentalist, experimentalist, fatalist, federalist, finalist, fundamentalist, generalist, gradualist, imperialist, individualist, industrialist, instrumentalist, internationalist, loyalist, materialist, medalist, mercantilist, minimalist, moralist, motorcyclist, philatelist, presidentialist, pugilist, revivalist, royalist, semifinalist, sensationalist, spiritualist, survivalist, traditionalist, vocalist, zimbalist