tear vs H2O

tear and H2O both are nouns.

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

tear (noun)	H2O (noun)
a drop of the clear salty saline solution secreted by the lacrimal glands	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
the act of tearing
an occasion for excessive eating or drinking
an opening made forcibly as by pulling apart

tear (verb)	H2O (verb)
separate or cause to separate abruptly
to separate or be separated by force
strip of feathers
move quickly and violently
fill with tears or shed tears