achene
- n small dry indehiscent fruit with the seed distinct from the fruit wall
acheron
- n (Greek mythology) a river in Hades across which the souls of the dead were carried by Charon
acherontia atropos
- n European hawkmoth with markings on the back resembling a human skull
acheson
- n United States statesman who promoted the Marshall Plan and helped establish NATO (1893-1971)