1939, representing A.A., the military abbreviation for anti-aircraft (see ack).
acidophilus
acidulate
acidulous
-acious
ack
ack-ack
acknowledge
acknowledgement
acknowledgment
ACLU
acme
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}