ill-tempered vs fussy

ill-tempered and fussy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
ill-tempered	No	Yes	No	No
fussy	No	Yes	No	No

As adjectives, ill-tempered and fussy are synonyms defined as:

Other synonyms of ill-tempered include bad-tempered, crabbed, crabby, cross, grouchy, grumpy.

ill-tempered (adjective)	fussy (adjective)
annoyed and irritable	overcrowded or cluttered with detail
	annoyed and irritable
	exacting especially about details