tetchy vs irritable

tetchy and irritable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
tetchy	No	Yes	No	No
irritable	No	Yes	No	No

As adjectives, tetchy and irritable are synonyms defined as:

Other synonyms of tetchy include cranky, fractious, nettlesome, peckish, peevish, pettish, petulant, scratchy, techy, testy.

tetchy (adjective)	irritable (adjective)
easily irritated or annoyed	easily irritated or annoyed
	capable of responding to stimuli
	abnormally sensitive to a stimulus