1. Towards the back; driven back by the wind against the mast; taken aback, surprised and put out.

2. An abacus.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• lback,
• vback,
• ababy,
• eback,
• nback,
• iback,
• tabaco,
• backi,
• abuce,
• atack,
• boack,
• abck,
• ambark,
• babck,
• duback,
• backw,
• sback,
• toback,
• abook,
• backu

• abc's,
• abbacy,
• abuja,
• Abbas,
• abaca,
• abc,
• abasia,
• abcs.

The adjective form of the word "aback" is "taken aback".