unilateralism vs doctrine

unilateralism and doctrine both are nouns.

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

As nouns, doctrine is a hypernym of unilateralism; that is, doctrine 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
doctrine: a belief (or system of beliefs) accepted as authoritative by some group or school

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

unilateralism (noun)	doctrine (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