1. The science of hearing and sound.

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

• accoustics,
• acustics,
• acoustc,
• acousitic,
• accoustic,
• accustics,
• acostic,
• aucoustic,
• acustic,
• acousticly,
• acoutics,
• accustic,
• acquatics,
• acoustci,
• acostics,
• acoustix,
• acousitcs,
• acoustiks,
• agoutiss,
• Aconestis

• acoustic,
• acosta,
• accusative,
• acoustical,
• acquisition,
• accusation,
• accost,
• acquisitive,
• acoustically,
• acoustician.

The adjective form of the word "acoustics" is "acoustic".