- crank, cranky, tender, tippy - (used of boats) inclined to heel over easily under sail
Antonym: stable (indirect, via unstable)
- cranky, fractious, irritable, nettlesome, peevish, peckish, pettish, petulant, testy, tetchy, techy - easily irritated or annoyed; "an incorrigibly fractious young man"; "not the least nettlesome of his countrymen"
Antonym: good-natured (indirect, via ill-natured)