internationalistic vs internationalist

internationalistic is not a noun while internationalist is a noun.

Word	Noun	Adjective	Verb	Adverb
internationalistic	No	Yes	No	No
internationalist	Yes	Yes	No	No

As adjectives, internationalistic and internationalist are synonyms defined as:

internationalistic and internationalist: influenced by or advocating internationalism

internationalistic (noun)	internationalist (noun)
	an advocate of internationalism
	a member of a socialist or communist international

internationalistic (adjective)	internationalist (adjective)
influenced by or advocating internationalism	influenced by or advocating internationalism