crust vs covering

crust and covering both are nouns.

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

As nouns, covering is a hypernym of crust; that is, covering is a word with a broader meaning than crust:

Other hypernyms of crust include cover, natural covering.

crust (noun)	covering (noun)
the trait of being rude and impertinent; inclined to take liberties	the act of protecting something by covering it
the outer layer of the Earth	the work of applying something
a hard outer layer that covers something	the act of concealing the existence of something by obstructing the view of it
	an artifact that covers something else (usually to protect or shelter or conceal it)
	a natural object that covers or envelops

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