grouchy vs fussy

grouchy and fussy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
grouchy	No	Yes	No	No
fussy	No	Yes	No	No

As adjectives, grouchy and fussy are synonyms defined as:

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

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