ill-humoured vs ill-humored

ill-humoured and ill-humored both are adjectives.

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

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

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

ill-humoured (adjective)	ill-humored (adjective)
brusque and surly and forbidding	brusque and surly and forbidding