irritable vs peckish

irritable and peckish both are adjectives.

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

As adjectives, irritable and peckish are synonyms defined as:

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

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