brinkmanship vs foreign policy

brinkmanship and foreign policy both are nouns.

Word	Noun	Adjective	Verb	Adverb
brinkmanship	Yes	No	No	No
foreign policy	Yes	No	No	No

As nouns, foreign policy is a hypernym of brinkmanship; that is, foreign policy is a word with a broader meaning than brinkmanship:

brinkmanship: the policy of pushing a dangerous situation to the brink of disaster (to the limits of safety)
foreign policy: a policy governing international relations

brinkmanship (noun)	foreign policy (noun)
the policy of pushing a dangerous situation to the brink of disaster (to the limits of safety)	a policy governing international relations