neoclassicistic vs neoclassicist

neoclassicistic is not a noun while neoclassicist is a noun.

Word	Noun	Adjective	Verb	Adverb
neoclassicistic	No	Yes	No	No
neoclassicist	Yes	Yes	No	No

As adjectives, neoclassicistic and neoclassicist are synonyms defined as:

neoclassicistic and neoclassicist: relating to or advocating neoclassicism

neoclassicistic (noun)	neoclassicist (noun)
	an advocate of neoclassicism

neoclassicistic (adjective)	neoclassicist (adjective)
relating to or advocating neoclassicism	relating to or advocating neoclassicism