sweat vs H2O

sweat and H2O both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweat	Yes	No	Yes	No
H2O	Yes	No	No	No

sweat (noun)	H2O (noun)
use of physical or mental energy; hard work	binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
salty fluid secreted by sweat glands
condensation of moisture on a cold surface
agitation resulting from active worry

sweat (verb)	H2O (verb)
excrete perspiration through the pores in the skin