The Collaborative International Dictionary of English v.0.48:

Rocket \Rock"et\, n. [F. roquette (cf. Sp. ruqueta, It
   ruchetta), fr. L. eruca.] (Bot.)
   (a) A cruciferous plant (Eruca sativa) sometimes eaten in
       Europe as a salad.
   (b) Damewort.
   (c) Rocket larkspur. See below.
       [1913 Webster]

   Dyer's Rocket. (Bot.) See Dyer's broom, under Broom.

   Rocket larkspur (Bot.), an annual plant with showy flowers
      in long racemes (Delphinium Ajacis).

   Sea rocket (Bot.), either of two fleshy cruciferous plants
      (Cakile maritima and Cakile Americana) found on the
      seashore of Europe and America.

   Yellow rocket (Bot.), a common cruciferous weed with yellow
      flowers (Barbarea vulgaris).
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rocket \Rock"et\, n. [It. rocchetta, fr. rocca a distaff, of
   German origin. Named from the resemblance in shape to a
   distaff. See Rock a distaff.]
   1. An artificial firework consisting of a cylindrical case of
      paper or metal filled with a composition of combustible
      ingredients, as niter, charcoal, and sulphur, and fastened
      to a guiding stick. The rocket is projected through the
      air by the force arising from the expansion of the gases
      liberated by combustion of the composition. Rockets are
      used as projectiles for various purposes, for signals, and
      also for pyrotechnic display.
      [1913 Webster]

   2. A blunt lance head used in the joust.
      [1913 Webster]

   3. any flying device propelled by the reactive force of hot
      gases expelled in the direction opposite its motion. The
      fuel used to generate the expelled gases in rockets may be
      solid or liquid; rockets propelled by liquid fuels
      typically have a combustible fuel (such as hydrogen or
      kerosene) which is combined inside the rocket engine with
      an oxidizer, such as liquid oxygen. Single liquid fuels
      (called monopropellants) are also known. Since rocket
      engines do not depend on a surrounding fluid medium to
      generate their thrust, as do airplanes with propellers or
      jet engines, they may be used for propulsion in the vacuum
      of space.
      [PJC]

   Congreve rocket, a powerful form of rocket for use in war,
      invented by Sir William Congreve. It may be used either in
      the field or for bombardment; in the former case, it is
      armed with shells or case shot; in the latter, with a
      combustible material inclosed in a metallic case, which is
      inextinguishable when kindled, and scatters its fire on
      every side.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rocket \Rock"et\, v. i. [imp. & p. p. Rocketed; p. pr. & vb.
   n. Rocketing.] (Sporting)
   To rise straight up; said of birds; usually in the present
   participle or as an adjective. [Eng.]
   [1913 Webster]

         An old cock pheasant came rocketing over me. --H. R.
                                                  Haggard.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Damewort \Dame"wort`\, n. (Bot.)
   A cruciferrous plant (Hesperis matronalis), remarkable for
   its fragrance, especially toward the close of the day; --
   called also rocket and dame's violet. --Loudon.
   [1913 Webster]

WordNet (r) 3.0 (2006):

rocket
    n 1: any vehicle self-propelled by a rocket engine [syn:
         rocket, projectile]
    2: a jet engine containing its own propellant and driven by
       reaction propulsion [syn: rocket, rocket engine]
    3: erect European annual often grown as a salad crop to be
       harvested when young and tender [syn: rocket, roquette,
       garden rocket, rocket salad, arugula, Eruca sativa,
       Eruca vesicaria sativa]
    4: propels bright light high in the sky, or used to propel a
       lifesaving line or harpoon [syn: rocket, skyrocket]
    5: sends a firework display high into the sky [syn: skyrocket,
       rocket]
    v 1: shoot up abruptly, like a rocket; "prices skyrocketed"
         [syn: rocket, skyrocket]
    2: propel with a rocket

Moby Thesaurus II by Grady Ward, 1.0:

295 Moby Thesaurus words for "rocket":
   AA target rocket, ABM, ASM, ATS, Asp, Asroc, Atlas, Atlas-Agena,
   Atlas-Centaur, Bullpup, Cajun, Corporal, Corvus, Crossbow, Dart,
   Deacon, Delta, Diamant, Dove, Earth insertion, Falcon, Firebee,
   Genie, Hawk, Holy Moses, Hound Dog, ICBM, Irish confetti, Jupiter,
   LEM, LM, Lacrosse, Lark, Loki, Loon, Mace, Matador, Navaho, Nike,
   Nike Ajax, Pershing, Petrel, Polaris, Poseidon, Quail, Ram, Rascal,
   Redeye, Redstone, Regulus I, Roman candle, SLAM, Saturn, Scout,
   Sentinel, Sergeant, Shillelagh, Sidewinder, Skybolt, Snark,
   Spaerobee, Sparrow, Subroc, Super Talos, Talos, Tartar, Terrier,
   Thor, Thor Able Star, Thor-Agena, Thor-Delta, Tiny Tim, Titan, V-2,
   Viking, WAC-Corporal, Wagtail, Zuni, aid to navigation, alarm,
   amber light, anchor rocket, antelope, antiaircraft rocket,
   antiradar rocket, apogee, arrow, atom-rocket, atomic warhead,
   attitude-control rocket, balefire, ballistic capsule,
   barrage rocket, bat bomb, beacon, beacon fire, bell, bell buoy,
   bird, blinker, blue darter, blue peter, blue streak, bob up, bola,
   bolt, boomerang, break water, brickbat, buoy, burn, cannonball,
   capsule, caution light, chemical rocket, climb, countermissile,
   courser, dart, deep-space ship, demolition rocket, docking,
   docking maneuver, eagle, electricity, express train, ferry rocket,
   fin-stabilized rocket, fireworks rocket, flare, flare rocket,
   flash, float up, fly up, flying tank, fog bell, fog signal,
   fog whistle, foghorn, fountain, fuel ship, gazelle, glance,
   go light, gong buoy, greased lightning, green light, greyhound,
   guided missile, gush, hare, heliograph, high sign,
   high-altitude rocket, homing rocket, incendiary rocket, injection,
   insertion, international alphabet flag,
   international numeral pennant, ion engine, ion rocket, jet,
   jet plane, jump up, kick, lark, leap up, leer, light, lightning,
   line-throwing rocket, liquid-fuel rocket, lunar excursion module,
   lunar module, manned rocket, marker beacon, mercury, missile,
   module, moon ship, multistage rocket, nod, nuclear warhead, nudge,
   orbit, parachute flare, parking orbit, payload, perigee,
   pilot flag, plasma engine, plasma jet, poke, police whistle,
   pop up, projectile, quarantine flag, quicksilver, radio beacon,
   ram rocket, red flag, red light, reentry, retro-float light,
   retro-rocket, rock, rocket engine, rocket motor, rockoon,
   sailing aid, scared rabbit, semaphore, semaphore flag,
   semaphore telegraph, shoot up, shot, shuttle rocket, sign, signal,
   signal beacon, signal bell, signal fire, signal flag, signal gong,
   signal gun, signal lamp, signal light, signal mast, signal post,
   signal rocket, signal shot, signal siren, signal tower, skylark,
   skyrocket, smoke rocket, snake, soar, soft landing,
   solid-fuel rocket, space capsule, space docking, space rocket,
   spacecraft, spaceship, spar buoy, spin-stabilized rocket, spinner,
   spring up, spurt, start up, stone, stop light, streak,
   streak of lightning, striped snake, supersonic rocket, surface,
   swallow, take off, the nod, the wink, thermonuclear warhead,
   thought, throw stick, throwing-stick, thunderbolt, torpedo,
   torrent, touch, traffic light, traffic signal, trajectory missile,
   transoceanic rocket, upleap, upshoot, upspear, upspring, upstart,
   vault up, vernier, vernier rocket, waddy, war rocket, warhead,
   watch fire, white flag, wigwag, wigwag flag, wind, window rocket,
   wink, yellow flag, zoom