Acoustics rhymes with:
agnostics, ballistics, characteristics, criminalistics, diagnostics, domestics, gymnastics, heuristics, linguistics, logistics, mystics, onomastics, plastics, statistics, statistics', thermoplastics
Acoustics sounds like:
accedes, acetic, achatz, acidic, acidosis, acids, acoustic, acquits, act's, acts, actus, aesthete's, aesthetes, aesthetic, aesthetics, agates, akita's, aquatic, ascetic, ashtec, ashtec's, asiatic, asides, assad's, assets, assets', assiduous, assists, associate's, associates, associates', august's, augusta's, augustus, auschwitz, azides, aztec, azteca, aztecs