calculus vs crust

calculus and crust both are nouns.

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

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

Other hypernyms of calculus include encrustation, incrustation.

calculus (noun)	crust (noun)
the branch of mathematics that is concerned with limits and with the differentiation and integration of functions	the trait of being rude and impertinent; inclined to take liberties
a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body	the outer layer of the Earth
an incrustation that forms on the teeth and gums	a hard outer layer that covers something

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