calculus vs incrustation

calculus and incrustation both are nouns.

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

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

Other hypernyms of calculus include crust, encrustation.

calculus (noun)	incrustation (noun)
the branch of mathematics that is concerned with limits and with the differentiation and integration of functions	a decorative coating of contrasting material that is applied to a surface as an inlay or overlay
a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body	a hard outer layer that covers something
an incrustation that forms on the teeth and gums	the formation of a crust