expressionism vs expressionistic

expressionism is a noun but expressionistic is not a noun.

Word	Noun	Adjective	Verb	Adverb
expressionism	Yes	No	No	No
expressionistic	No	Yes	No	No

expressionism (noun)	expressionistic (noun)
an art movement early in the 20th century; the artist's subjective expression of inner experiences was emphasized; an inner feeling was expressed through a distorted rendition of reality

expressionism (adjective)	expressionistic (adjective)
	of or relating to expressionism