| allophone | (noun) (linguistics) any of various acoustically different forms of the same phoneme | - |
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| cellphone | (noun) a hand-held mobile radiotelephone for use in an area divided into small sections, each with its own short-range transmitter/receiver | Synonyms: cell, cellular phone, cellular telephone, mobile phone |
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| chordophone | (noun) a stringed instrument of the group including harps, lutes, lyres, and zithers | - |
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| diaphone | (noun) a foghorn that makes a signal consisting of two tones | - |
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| earphone | (noun) electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear | Synonyms: earpiece, headphone, phone |
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| entryphone | (noun) An intercom system which enables someone, without opening the door, to converse with the person who has rung the doorbell. | - |
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| gramophone | (noun) an antique record player; the sound of the vibrating needle is amplified acoustically | Synonyms: acoustic gramophone |
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| headphone | (noun) electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear | Synonyms: earphone, earpiece, phone |
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| heckelphone | (noun) an oboe pitched an octave below the ordinary oboe | Synonyms: basset oboe |
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| homophone | (noun) two words are homophones if they are pronounced the same way but differ in meaning or spelling or both (e.g. bare and bear) | - |
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| hone | (noun) a whetstone made of fine gritstone; used for sharpening razors | - |
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| (noun) a tool consisting of a number of fine abrasive slips held in a machine head, rotated and reciprocated to impart a smooth finish to cylinder bores, etc. | - |
| hydromorphone | (noun) a narcotic analgesic (trade name Dilaudid) used to treat moderate to severe pain | Synonyms: Dilaudid, hydromorphone hydrochloride |
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| interphone | (noun) a telephonic intercommunication system linking different rooms in a building or ship etc | - |
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| isophone | (noun) linguistics, an isogloss marking off an area in which a particular feature of pronunciation is found. | - |
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| lagerphone | (noun) an Australian percussion instrument used for playing bush music; a long stick with bottle caps nailed loosely to it; played by hitting it with a stick or banging it on the ground | - |
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| megaphone | (noun) a cone-shaped acoustic device held to the mouth to intensify and direct the human voice | - |
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| membranophone | (noun) a musical percussion instrument; usually consists of a hollow cylinder with a membrane stretched across each end | Synonyms: drum, tympan |
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| microphone | (noun) device for converting sound waves into electrical energy | Synonyms: mic, mike |
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| phone | (noun) electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds | Synonyms: telephone, telephone set |
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| (noun) electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear | Synonyms: earphone, earpiece, headphone |
| (noun) (phonetics) an individual sound unit of speech without concern as to whether or not it is a phoneme of some language | Synonyms: sound, speech sound |
| pistonphone | (noun) an acoustical calibrator (sound source) that uses a closed coupling volume to generate a precise sound pressure for the calibration of measurement microphones. | - |
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| polyphone | (noun) a letter that has two or more pronunciations | Synonyms: polyphonic letter |
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| radiophone | (noun) a telephone that communicates by radio waves rather than along cables | Synonyms: radiotelephone, wireless telephone |
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| radiotelephone | (noun) a telephone that communicates by radio waves rather than along cables | Synonyms: radiophone, wireless telephone |
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| (noun) telephony that uses transmission by radio rather than by wire | Synonyms: radiotelephony, wireless telephone |
| saxophone | (noun) a single-reed woodwind with a conical bore | Synonyms: sax |
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| smartphone | (noun) a mobile phone with more advanced computing capability and connectivity than basic feature phones | Synonyms: smart phone |
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| sousaphone | (noun) the lowest brass wind instrument | Synonyms: bass horn, tuba |
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| speakerphone | (noun) a telephone with a microphone and loudspeaker; can be used without picking up a handset; several people can participate in a call at the same time | - |
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| telephone | (noun) electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds | Synonyms: phone, telephone set |
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| (noun) transmitting speech at a distance | Synonyms: telephony |
| vibraphone | (noun) a percussion instrument similar to a xylophone but having metal bars and rotating disks in the resonators that produce a vibrato sound | Synonyms: vibes, vibraharp |
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| xylophone | (noun) a percussion instrument with wooden bars tuned to produce a chromatic scale and with resonators; played with small mallets | Synonyms: marimba |
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