ack-ack
— Noun
– English
~ artillery designed to shoot upward at airplanes
ackee
— Noun
– English
~ red pear-shaped tropical fruit with poisonous seeds; flesh is poisonous when unripe or overripe
acknowledgement
— Noun
– English
~ the state or quality of being recognized or acknowledged; "the partners were delighted with the recognition of their work"; "she seems to avoid much in the way of recognition or acknowledgement of feminist work prior to her own"