1. Pertaining to the sense of hearing, or the doctrine of sounds. Acoustic duct, external passage of the ear. Acoustic nerve, the immediate organ of sound.

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

• aucostic,
• accoustics,
• acrosstic,
• acustics,
• acuastic,
• aucustic,
• acoustc,
• acousitic,
• accoustic,
• accustics,
• acostic,
• acoutsic,
• acousted,
• acuatic,
• aucoustic,
• acustic,
• acoutic,
• accostic,
• acousticly,
• acquatic

• acquisitive,
• acoustics,
• accusative,
• accusation,
• acquisition,
• accustom,
• acoustical,
• acosta,
• accost,
• acoustician.

The adverb form of the word "acoustic" is "acoustically".

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

The plural of the "acoustic" can be the "acoustics".

The singular of the "acoustic" can be the "acoustic".