testy vs cranky

testy and cranky both are adjectives.

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

As adjectives, testy and cranky are synonyms defined as:

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

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