impression vs impressionistic

impression is a noun but impressionistic is not a noun.

Word	Noun	Adjective	Verb	Adverb
impression	Yes	No	No	No
impressionistic	No	Yes	No	No

impression (noun)	impressionistic (noun)
an impressionistic portrayal of a person
the act of pressing one thing on or into the surface of another
(dentistry) an imprint of the teeth and gums in wax or plaster
an outward appearance
a vague idea in which some confidence is placed
a clear and telling mental image
a symbol that is the result of printing or engraving
all the copies of a work printed at one time
a concavity in a surface produced by pressing

impression (adjective)	impressionistic (adjective)
	relating to or characteristic of Impressionism
	of or relating to or based on an impression rather than on facts or reasoning