A boat with two parallel hulls held together by single deck.

Roget 273: ship, vessel, sail; craft, bottom.    navy, marine, fleet, flotilla; shipping.    man of war etc. (combatant) 726; transport, tender, storeship^†; merchant ship, merchantman; packet, liner; whaler, slaver, collier, coaster, lighter; fishing boat, pilot boat; trawler, hulk; yacht; baggala^†; floating hotel, floating palace; ocean greyhound.    ship, bark, barque, brig, snow, hermaphrodite brig; brigantine, barkantine^†; schooner; topsail schooner, for and aft schooner, three masted schooner; chasse-maree [Fr.]; sloop, cutter, corvette, clipper, foist, yawl, dandy, ketch, smack, lugger, barge, hoy^†, cat, buss; sailer, sailing vessel; windjammer; steamer, steamboat, steamship, liner, ocean liner, cruisp, flap, dab, pat, thump, beat, blow, bang, slam, dash; punch, thwack, whack; hit hard, strike hard; swap, batter, dowse^†, baste; pelt, patter, buffet, belabor; fetch one a blow; poke at, pip, ship of the line; destroyer, cruiser, frigate; landing ship, LST; aircraft carrier, carrier, flattop [Coll.], nuclear powered carrier; submarine, submersible, atomic submarine.    boat, pinnace, launch; life boat, long boat, jolly boat, bum boat, fly boat, cock boat, ferry boat, canal boat; swamp boat, ark, bully, battery, bateau [Can.], broadhorn^†, dory, droger^†, drogher; dugout, durham boat, flatboat, galiot^†; shallop^†, gig, funny, skiff, dingy, scow, cockleshell, wherry, coble^†, punt, cog, kedge, lerret^†; eight oar, four oar, pair oar; randan^†; outrigger; float, raft, pontoon; prame^†; iceboat, ice canoe, ice yacht.    catamaran, hydroplane, hovercraft, coracle, gondola, carvel^†, caravel; felucca, caique^†, canoe, birch bark canoe, dugout canoe; galley, galleyfoist^†; bilander^†, dogger^†, hooker, howker^†; argosy, carack^†; galliass^†, galleon; polacca^†, polacre^†, tartane^†, junk, lorcha^†, praam^†, proa^†, prahu^†, saick^†, sampan, xebec, dhow; dahabeah^†; nuggah^†; kayak, keel boat [U.S.], log canoe, pirogue; quadrireme^†, trireme; stern-wheeler [U.S.]; wanigan^†, wangan [U.S.], wharf boat.    balloon; airship, aeroplane; biplane, monoplane, triplane^†; hydroplane; aerodrome; air balloon, pilot balloon, fire balloon, dirigible, zeppelin; aerostat, Montgolfier; kite, parachute.    jet plane, rocket plane, jet liner, turbojet, prop-jet, propeller plane; corporate plane, corporate jet, private plane, private aviation; airline, common carrier; fighter, bomber, fighter-bomber, escort plane, spy plane; supersonic aircraft, subsonic aircraft.    ... show more

Roget 726: combatant; disputant, controversialist, polemic, litigant, belligerent; competitor, rival, corrival^†; fighter, assailant; champion, Paladin; mosstrooper^†, swashbuckler fire eater, duelist, bully, bludgeon man, rough.    prize fighter, pugilist, boxer, bruiser, the fancy, gladiator, athlete, wrestler; fighting-cock, game-cock; warrior, soldier, fighting man, Amazon, man at arms, armigerent^†; campaigner, veteran; swordsman, sabreur^†, redcoat, military man, Rajput.    armed force, troops, soldiery, military forces, sabaoth^†, the army, standing army, regulars, the line, troops of the line, militia, yeomanry, volunteers, trainband, fencible^†; auxiliary, bersagliere^†, brave; garde-nationale, garde-royale [Fr.]; minuteman [U.S.]; auxiliary forces, reserve forces; reserves, posse comitatus [Lat.], national guard, gendarme, beefeater; guards, guardsman; yeomen of the guard, life guards, household troops.    janissary; myrmidon; Mama, Mameluke; spahee^†, spahi^†, Cossack, Croat, Pandoz.    irregular, guerilla, partisan, condottiere^†; franctireur [Fr.], tirailleur^†, bashi-bazouk; [guerilla organization names: list], vietminh, vietcong; shining path; contras; huk, hukbalahap.    mercenary, soldier of fortune; hired gun, gunfighter, gunslinger; bushwhacker, free lance, companion; Hessian.    hit man torpedo, soldier.    levy, draught; Landwehr [G.], Landsturm [G.]; conscript, recruit, cadet, raw levies.    infantry, infantryman, private, private soldier, foot soldier; Tommy Atkins^†, rank and file, peon, trooper, sepoy^†, legionnaire, legionary, cannon fodder, food for powder; officer etc. (commander) 745; subaltern, ensign, standard bearer; spearman, pikeman^†; spear bearer; halberdier^†, lancer; musketeer, carabineer^†, rifleman, jager [G.], sharpshooter, yager^†, skirmisher; grenadier, fusileer^†; archer, bowman.    horse and foot; horse soldier; cavalry, horse, artillery, horse artillery, light horse, voltigeur [Fr.], uhlan, mounted rifles, dragoon, hussar; light dragoon, heavy dragoon; heavy; cuirassier [Fr.]; Foot Guards, Horse Guards.    gunner, cannoneer, bombardier, artilleryman^†, matross^†; sapper, sapper and miner; engineer; light infantry, rifles, chasseur [Fr.], zouave; military train, coolie.    army, corps d'armee [Fr.], host, division, battalia^†, column, wing, detachment, garrison, flying column, brigade, regiment, corps, battalion, sotnia^†, squadron, company, platoon, battery, subdivision, section, squad; piquet, picket, guard, rank, file; legion, phalanx, cohort; cloud of skirmishers.    war horse, charger, destrier.    marine, man-of-war's man etc. (sailor) 269; navy, wooden walls, naval forces, fleet, flotilla, armada, squadron.    [ships of war] man-of-war; destroyer; submarine; minesweeper; torpedo-boat, torpedo-destroyer; patrol torpedo boat, PT boat; torpedo-catcher, war castle, H.   M.S.; battleship, battle wagon, dreadnought, line of battle ship, ship of the line; aircraft carrier, carrier.    flattop [Coll.]; helicopter carrier; missile platform, missile boat; ironclad, turret ship, ram, monitor, floating battery; first-rate, frigate, sloop of war, corvette, gunboat, bomb vessel; flagship, guard ship, cruiser; armored cruiser, protected cruiser; privateer.    [supporting ships] tender; store ship, troop ship; transport, catamaran; merchant marine.    ... show more

Dutch: katamaran
Polish: dwukadłubowiec, katamaran