willpower vs resolve

willpower and resolve both are nouns.

Word	Noun	Adjective	Verb	Adverb
willpower	Yes	No	No	No
resolve	Yes	No	Yes	No

As nouns, resolve is a hypernym of willpower; that is, resolve is a word with a broader meaning than willpower:

Other hypernyms of willpower include firmness, firmness of purpose, resoluteness, resolution.

willpower (noun)	resolve (noun)
the trait of resolutely controlling your own behavior	the trait of being resolute
	a formal expression by a meeting; agreed to by a vote

willpower (verb)	resolve (verb)
	cause to go into a solution
	bring to an end; settle conclusively
	reach a decision
	find the solution
	understand the meaning of
	reach a conclusion after a discussion or deliberation
	make clearly visible