passive air defense

Letters that make passive air defense

s, a, d, e, f, n, p, r, i, v are letters that make 'passive air defense'

PA, si, Defense, IR, fen, Pa, en, SE, air defense, SI, SS, passive, iv, as, pass, pas, air, defense, AI, ass, IV, ai, AS, DE, pa, As, Ir, Fe, Se, Si are words within 'passive air defense'

1 possible definitions for 'passive air defense'

Under this definition, passive air defense is a noun and has the following properties:

'passive air defense' can be a type of air defense.