segregator vs segregationist

segregator and segregationist both are nouns.

Word	Noun	Adjective	Verb	Adverb
segregator	Yes	No	No	No
segregationist	Yes	No	No	No

As nouns, segregator and segregationist are synonyms defined as:

segregator and segregationist: someone who believes the racial groups should be kept apart

segregator (noun)	segregationist (noun)
someone who believes the racial groups should be kept apart	someone who believes the racial groups should be kept apart