Here's what rhymes with imperialists.

Consider these alternatives

reactionaries / varies imperialist / materialist imperialism / given colonialists / neocolonialists colonialist / neocolonialist imperialistic / characteristic expansionism / given infidel / well counterrevolutionaries / varies provocations / relations occupiers / desires oppressor / never aggressions / presence isolationism / given reactionary / very colonialism / given unilateralism / given tyrannical / mechanical demoralize / size interventionism / given fogies / bodies retaliate / late