petulant vs cranky

petulant and cranky both are adjectives.

Word	Noun	Adjective	Verb	Adverb
petulant	No	Yes	No	No
cranky	No	Yes	No	No

As adjectives, petulant and cranky are synonyms defined as:

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

petulant (adjective)	cranky (adjective)
easily irritated or annoyed	easily irritated or annoyed
	(used of boats) inclined to heel over easily under sail