WordNet (r) 3.0 (2006):

Air Corps
    n 1: formerly the airborne division of the United States Army

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "air corps":
   adjutant general corps, air arm, air force, air service,
   armored corps, army corps, army nurse corps, bugle corps,
   chemical corps, corps, corps of cadets, corps of signals,
   corps troops, dental corps, drum corps, engineer corps, escadrille,
   flight, marine corps, medical corps, military police corps,
   ordnance corps, quartermaster corps, rifle corps, signal corps,
   squadron, strategic air force, tactical air force, tank corps,
   transportation corps, veterinary corps, wing