abstractionism vs abstractionist

abstractionism and abstractionist both are nouns.

Word	Noun	Adjective	Verb	Adverb
abstractionism	Yes	No	No	No
abstractionist	Yes	Yes	No	No

abstractionism (noun)	abstractionist (noun)
an abstract genre of art; artistic content depends on internal form rather than pictorial representation	a painter of abstract pictures
a representation having no reference to concrete objects or specific examples

abstractionism (adjective)	abstractionist (adjective)
	not representing or imitating external reality or the objects of nature