"Air cavalry" is a military term used to refer to troops that use helicopters for transportation and combat. This term can be replaced with other synonyms such as "airborne cavalry", which means the same thing. Another synonym for "air cavalry" is "helicopter troops". This term is more specific and refers to troops who use helicopters exclusively. Additionally, "aerial cavalry" can also be used to describe troops who are deployed from helicopters for combat purposes. "Air assault troops" is another synonym for "air cavalry" and refers to the use of helicopters for rapid deployment into a battle zone. Overall, any of these synonyms effectively describe military troops who utilize helicopters for transportation and combat.