struggle vs sweat

struggle and sweat both are nouns.

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

As nouns, sweat is a hypernym of struggle; that is, sweat is a word with a broader meaning than struggle:

Other hypernyms of struggle include effort, elbow grease, exertion, travail.

struggle (noun)	sweat (noun)
strenuous effort	use of physical or mental energy; hard work
an energetic attempt to achieve something	salty fluid secreted by sweat glands
an open clash between two opposing groups (or individuals)	condensation of moisture on a cold surface
	agitation resulting from active worry

struggle (verb)	sweat (verb)
be engaged in a fight; carry on a fight	excrete perspiration through the pores in the skin
to exert strenuous effort against opposition
climb awkwardly, as if by scrambling
make a strenuous or labored effort