grouchy vs ill-tempered

grouchy and ill-tempered both are adjectives.

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

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

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

grouchy (adjective)	ill-tempered (adjective)
annoyed and irritable	annoyed and irritable