strive vs struggle

strive is not a noun while struggle is a noun.

Word	Noun	Adjective	Verb	Adverb
strive	No	No	Yes	No
struggle	Yes	No	Yes	No

As verbs, struggle is a hyponym of strive; that is, struggle is a word with a more specific, narrower meaning than strive:

Other hyponyms of strive include be at pains, take pains, buck.

strive (noun)	struggle (noun)
	strenuous effort
	an energetic attempt to achieve something
	an open clash between two opposing groups (or individuals)

strive (verb)	struggle (verb)
to exert much effort or energy	be engaged in a fight; carry on a fight
attempt by employing effort	to exert strenuous effort against opposition
	climb awkwardly, as if by scrambling
	make a strenuous or labored effort