imperialism vs imperialist

imperialism and imperialist both are nouns.

Word	Noun	Adjective	Verb	Adverb
imperialism	Yes	No	No	No
imperialist	Yes	Yes	No	No

imperialism (noun)	imperialist (noun)
any instance of aggressive extension of authority	a believer in imperialism
a political orientation that advocates imperial interests
a policy of extending your rule over foreign countries

imperialism (adjective)	imperialist (adjective)
	of or relating to imperialism