Separatists rhymes with:
hypnotists, pragmatists, adventists, chartists, clarinetists, cultists, dentist's, dentists', elitists, hypnotists, leftists, pragmatists, rightists, scientist's, scientists, scientists', statists
hypnotists, pragmatists, adventists, chartists, clarinetists, cultists, dentist's, dentists', elitists, hypnotists, leftists, pragmatists, rightists, scientist's, scientists, scientists', statists