crust vs discourtesy

crust and discourtesy both are nouns.

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

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

Other hypernyms of crust include rudeness.

crust (noun)	discourtesy (noun)
the trait of being rude and impertinent; inclined to take liberties	a lack of politeness; a failure to show regard for others; wounding the feelings of others
the outer layer of the Earth	a manner that is rude and insulting
a hard outer layer that covers something	an expression of lack of respect

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