WordNet (r) 3.0 (2006):

rocketry
    n 1: the branch of engineering science that studies rocket
         design and operation

Moby Thesaurus II by Grady Ward, 1.0:

46 Moby Thesaurus words for "rocketry":
   aerial photography, aeroballistics, aerodynamics, aerogeology,
   aerography, aerology, aeromechanics, aeromedicine, aerometry,
   aeronautical meteorology, aerophotography, aerophysics, aeroscopy,
   aerospace medicine, aerospace research, aerospace science,
   aerospace technology, aerostatics, archery, artillery,
   astronautics, aviation technology, avionics, ballistics,
   bioastronautics, climatology, escape velocity, grand tour, gunnery,
   hydrostatics, interplanetary travel, kinematics, kinetics,
   meteorology, missilery, musketry, photometry, pneumatics,
   science fiction, space flight, space medicine, space travel,
   space walk, step flight, supersonics, trip to Mars