pointillistic vs pointillism

pointillistic is not a noun while pointillism is a noun.

Word	Noun	Adjective	Verb	Adverb
pointillistic	No	Yes	No	No
pointillism	Yes	No	No	No

pointillistic (noun)	pointillism (noun)
	a genre of painting characterized by the application of paint in dots and small strokes; developed by Georges Seurat and his followers in late 19th century France
	a school of painters who used a technique of painting with tiny dots of pure colors that would blend in the viewer's eye; developed by Georges Seurat and his followers late in 19th century France

pointillistic (adjective)	pointillism (adjective)
of or relating to pointillism