firmness of purpose vs resolve

firmness of purpose and resolve both are nouns.

Word	Noun	Adjective	Verb	Adverb
firmness of purpose	Yes	No	No	No
resolve	Yes	No	Yes	No

As nouns, firmness of purpose and resolve are synonyms defined as:

Other synonyms of firmness of purpose include firmness, resoluteness, resolution.

firmness of purpose (noun)	resolve (noun)
the trait of being resolute	the trait of being resolute
	a formal expression by a meeting; agreed to by a vote

firmness of purpose (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