grouchy vs bad-tempered

grouchy and bad-tempered both are adjectives.

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

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

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

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