peckish vs irritable

peckish and irritable both are adjectives.

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

As adjectives, peckish and irritable are synonyms defined as:

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

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