struggler vs struggle

struggler and struggle both are nouns.

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

struggler (noun)	struggle (noun)
a person who struggles with difficulties or with great effort	strenuous effort
	an energetic attempt to achieve something
	an open clash between two opposing groups (or individuals)

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