unilateralism vs ism

unilateralism and ism both are nouns.

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

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

unilateralism: the doctrine that nations should conduct their foreign affairs individualistically without the advice or involvement of other nations
ism: a belief (or system of beliefs) accepted as authoritative by some group or school

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

unilateralism (noun)	ism (noun)
the doctrine that nations should conduct their foreign affairs individualistically without the advice or involvement of other nations	a belief (or system of beliefs) accepted as authoritative by some group or school