WordNet (r) 3.0 (2006):

liquid oxygen
    n 1: a bluish translucent magnetic liquid obtained by
         compressing gaseous oxygen and then cooling it below its
         boiling point; used as an oxidizer in rocket propellants
         [syn: liquid oxygen, LOX]

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "liquid oxygen":
   Dry Ice, Freon, ammonia, carbon dioxide, charge, coolant, ether,
   ethyl chloride, exhaust, freezing mixture, fuel, ice, ice cubes,
   jet propulsion, liquid air, liquid helium, propellant,
   propulsion charge, reaction propulsion, refrigerant,
   rocket propulsion, thrust