irritable vs fractious

irritable and fractious both are adjectives.

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

As adjectives, irritable and fractious are synonyms defined as:

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

irritable (adjective)	fractious (adjective)
easily irritated or annoyed	unpredictably difficult in operation; likely to be troublesome
capable of responding to stimuli	stubbornly resistant to authority or control
abnormally sensitive to a stimulus	easily irritated or annoyed