/ Thesaurus / A Synonyms of active air defense Find synonyms for: Noun1. active air defense, air defenseusage: air defense by the use aircraft or missiles or artillery or electronic countermeasuresWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: torrid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language