crusty vs crust

crusty is not a noun while crust is a noun.

Word	Noun	Adjective	Verb	Adverb
crusty	No	Yes	No	No
crust	Yes	No	Yes	No

crusty (noun)	crust (noun)
	the trait of being rude and impertinent; inclined to take liberties
	the outer layer of the Earth
	a hard outer layer that covers something

crusty (adjective)	crust (adjective)
having a hardened crust as a covering
brusque and surly and forbidding

crusty (verb)	crust (verb)
	form a crust or form into a crust