WordNet (r) 3.0 (2006):

space capsule
    n 1: a spacecraft designed to transport people and support human
         life in outer space [syn: space capsule, capsule]

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "space capsule":
   Earth insertion, LEM, LM, apogee, attitude-control rocket,
   ballistic capsule, burn, capsule, deep-space ship, docking,
   docking maneuver, ferry rocket, fuel ship, injection, insertion,
   lunar excursion module, lunar module, manned rocket, module,
   moon ship, multistage rocket, orbit, parking orbit, perigee,
   reentry, rocket, shuttle rocket, soft landing, space docking,
   space rocket, spacecraft, spaceship