| sound | (adjective) financially secure and safe | - |
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| (adjective) in good condition; free from defect or damage or decay | - |
| (adjective) complete; thorough | - |
| (adjective) (of sleep) deep and complete | Synonyms: heavy, profound, wakeless |
| (adjective) in excellent physical condition | Synonyms: good |
| (adjective) exercising or showing good judgment | Synonyms: healthy, intelligent, level-headed, levelheaded |
| (adjective) free from moral defect | - |
| (adjective) vigorous or severe | - |
| (adjective) having legal efficacy or force | Synonyms: effectual, legal |
| (adjective) logically valid | Synonyms: reasoned, well-grounded |
| (noun) the particular auditory effect produced by a given cause | - |
| (noun) the subjective sensation of hearing something | Synonyms: auditory sensation |
| (noun) the audible part of a transmitted signal | Synonyms: audio |
| (noun) (phonetics) an individual sound unit of speech without concern as to whether or not it is a phoneme of some language | Synonyms: phone, speech sound |
| (noun) the sudden occurrence of an audible event | - |
| (noun) a large ocean inlet or deep bay | - |
| (noun) a narrow channel of the sea joining two larger bodies of water | Synonyms: strait |
| (noun) mechanical vibrations transmitted by an elastic medium | - |
| (verb) measure the depth of (a body of water) with a sounding line | Synonyms: fathom |
| (verb) utter with vibrating vocal chords | Synonyms: vocalise, vocalize, voice |
| (verb) make a certain noise or sound | Synonyms: go |
| (verb) cause to sound | - |
| (verb) announce by means of a sound | - |
| (verb) give off a certain sound or sounds | - |
| (verb) appear in a certain way | - |
| soundable | (adjective) (of depth) capable of being sounded or measured for depth | Synonyms: fathomable, plumbable |
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| soundboard | (noun) (music) resonator consisting of a thin board whose vibrations reinforce the sound of the instrument | Synonyms: sounding board |
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| soundbox | (noun) a resonating chamber in a musical instrument (as the body of a violin) | Synonyms: body |
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| sounder | (noun) a device for making soundings | - |
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| sounding | (adjective) making or having a sound as specified; used as a combining form | - |
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| (adjective) having volume or deepness | - |
| (adjective) appearing to be as specified; usually used as combining forms | Synonyms: looking |
| (noun) the act of measuring depth of water (usually with a sounding line) | - |
| (noun) a measure of the depth of water taken with a sounding line | - |
| soundless | (adjective) marked by absence of sound | Synonyms: silent, still |
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| soundlessly | (adverb) without a sound | Synonyms: noiselessly |
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| soundlessness | (noun) the property of making no sound | Synonyms: quietness |
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| soundly | (adverb) completely and absolutely (`good' is sometimes used informally for `thoroughly') | Synonyms: good, thoroughly |
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| (adverb) deeply or completely | - |
| soundman | (noun) a technician in charge of amplifying sound or producing sound effects (as for a TV or radio broadcast) | - |
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| soundness | (noun) the muscle tone of healthy tissue | Synonyms: firmness |
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| (noun) the quality of being prudent and sensible | Synonyms: wisdom, wiseness |
| (noun) a state or condition free from damage or decay | - |
| soundproof | (adjective) impervious to, or not penetrable by, sound | - |
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| (verb) insulate against noise | - |
| soundtrack | (noun) sound recording on a narrow strip of a motion picture film | - |
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