expansionism vs ism

expansionism and ism both are nouns.

Word	Noun	Adjective	Verb	Adverb
expansionism	Yes	No	No	No
ism	Yes	No	No	No

As nouns, ism is a hypernym of expansionism; that is, ism is a word with a broader meaning than expansionism:

expansionism: the doctrine of expanding the territory or the economic influence of a country
ism: a belief (or system of beliefs) accepted as authoritative by some group or school

Other hypernyms of expansionism include doctrine, philosophical system, philosophy, school of thought.

expansionism (noun)	ism (noun)
the doctrine of expanding the territory or the economic influence of a country	a belief (or system of beliefs) accepted as authoritative by some group or school