Synonyms for Air Force (same or very similar meaning)
WordNet sense 1 (the airforce of the United States of America; the agency that defends the United States through control and exploitation of air and space):
USAF, United States Air Force, U. S. Air Force, US Air ForceWordNet sense 2 (the airborne branch of a country's armed forces):
airforceFrom the ODE community, based on WordNetadd/edit