ill-humored vs crusty

ill-humored and crusty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
ill-humored	No	Yes	No	No
crusty	No	Yes	No	No

As adjectives, ill-humored and crusty are synonyms defined as:

Other synonyms of ill-humored include curmudgeonly, gruff, ill-humoured.

ill-humored (adjective)	crusty (adjective)
brusque and surly and forbidding	having a hardened crust as a covering
	brusque and surly and forbidding