fractious vs testy

fractious and testy both are adjectives.

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

As adjectives, fractious and testy are synonyms defined as:

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

fractious (adjective)	testy (adjective)
unpredictably difficult in operation; likely to be troublesome	easily irritated or annoyed
stubbornly resistant to authority or control
easily irritated or annoyed