N hearing, audition, auscultation, eavesdropping, audibility, acute ear, nice ear, delicate ear, quick ear, sharp ear, correct ear, musical ear, ear for music, ear, auricle, lug, acoustic organs, auditory apparatus, eardrum, tympanum, tympanic membrane, ear trumpet, speaking trumpet, hearing aid, stethoscope, earshot, hearing distance, hearing, hearing range, sound, carrying distance, telephone, phone, telephone booth, intercom, house phone, radiotelephone, radiophone, wireless, wireless telephone, mobile telephone, car radio, police radio, two-way radio, walkie-talkie, handie-talkie, citizen's band, CB, amateur radio, ham radio, short-wave radio, police band, ship-to-shore radio, airplane radio, control tower communication, (communication), electronic devices, phonograph, gramophone, megaphone, phonorganon, microphone, directional microphone, mike, hand mike, lapel microphone, phonograph needle, stylus, diamond stylus, pickup, reading head (electronic devices), hearer, auditor, listener, eavesdropper, listener-in, auditory, audience, otology, otorhinolaryngology, otologist, otorhinolaryngologist, hearing, auditory, auricular, acoustic, phonic, arrectis auribus, Int, hark, hark ye!, hear!, list, listen!, O yes!, Oyez!, listen up, listen here!, hear ye!, attention!, achtung.

For further exploring for "radiotelephone" in Webster Dictionary Online