portrayer vs portraitist

portrayer and portraitist both are nouns.

Word	Noun	Adjective	Verb	Adverb
portrayer	Yes	No	No	No
portraitist	Yes	No	No	No

As nouns, portrayer and portraitist are synonyms defined as:

Other synonyms of portrayer include limner, portrait painter.

portrayer (noun)	portraitist (noun)
a painter or drawer of portraits	a painter or drawer of portraits