crust vs sial

crust and sial both are nouns.

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

crust (noun)	sial (noun)
the trait of being rude and impertinent; inclined to take liberties	the granitelike rocks that form the outermost layer of the earth's crust; rich in silicon and aluminum
the outer layer of the Earth
a hard outer layer that covers something

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