ack ack Definition

flak, acknowledgment, antiaircraft, ack-ack, dispurveyance, pom-pom, ace, acknowledgement, aircraft, antitank, ao, appreciation, assault, ay, boat, boche, bounce, caliber, calibre, cannon, cf, column, command, confederate, configure, confirm, confirmation, confirmatory, confirming, destroyer, draft, elec, film, grenade, gun, instantiation, intercept, interrupt, launch, millimeter, missile, mortar, move, node, pi, pounder, recognition, reconnaissance, reset, syn, tank, terminate, torpedo,