Harmonica rhymes with:
monica, bonica, donica, konica, microelettronica, monica, telefonica, veronica, biotechnica, bjelasnica, bonica, britannica, danica, dominica, donica, finmeccanica, konica, microelettronica, monica, telefonica, tunica, veronica, zenica
Harmonica sounds like:
haering, hairiness, harangue, harangues, haring, harm's, harmening, harmes, harming, harmon's, harmonic, harmonics, harmonies, harmonious, harmonize, harmonizes, harms, harnack, harnage, harness, harnesses, harnisch, harnish, harnois, harring, harrowing, hearing, hearing's, hearings, hearns, heironimus, hering, herman's, hermance, hermanns, hermans, hermes, hermias, hermosa, herms, heroin's, heroines, heron's, herons, herring, herrings, herringshaw, herronimo's, heuring, hiring, hirings, hiromasa, hirons, hormones, hormuz, horn's, hornack, hornak, hornick, hornig, hornik, horning, horns, hornung, hornyak, hronek, hurrying