sweat vs toil

sweat and toil both are nouns.

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

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

Other hypernyms of sweat include labor, labour.

sweat (noun)	toil (noun)
use of physical or mental energy; hard work	productive work (especially physical work done for wages)
salty fluid secreted by sweat glands
condensation of moisture on a cold surface
agitation resulting from active worry

sweat (verb)	toil (verb)
excrete perspiration through the pores in the skin	work hard