flake vs H2O

flake and H2O both are nouns.

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

flake (noun)	H2O (noun)
a small fragment of something broken off from the whole	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
a person with an unusual or odd personality
a crystal of snow

flake (verb)	H2O (verb)
come off in flakes or thin small pieces
cover with flakes or as if with flakes
form into flakes