What is another word for "jack"?

Roget's Thesaurus (1911) lists these synonyms for "jack": able, acrobat, aerial, aeronaut, aeroplanist, air, airman, and, attendant, aviator, aviatrix, balloonist, bargee, bargeman, bel, birdman, boatman, boatswain, bon, buffoon, bush, cap, caricaturist, charlatan, clown, cockswain, corps, coxswain, crew, dandy, dock, epigrammatist, esprit, ferryman, flier, flight, fool, gaillard, glider, gondolier.