ack-ack 
(ăkăk′)
(ăkăk′)n.
Slang
Slang
1. An antiaircraft gun.
2. Antiaircraft fire.
[British telephone code for AA, abbreviation for ANTIAIRCRAFT.]
- archetypic
- archetypical
- archetypically
- archfiend
- archi-
- Archibald
- Archibald Alexander Leach.
- archidiaconal
- archidiaconate
- archiepiscopal
- archiepiscopality
- archiepiscopate
- archil
- archil
- archimandrite
- Archimedean
- Archimedean screw
- Archimedean solid
- Archimedes
- Archimedes' screw
- archine
- archipelagic
- archipelago
- Archipenko
- architect