adj. 1
Good; acceptable; decent.
That's a sound track you're playing.
adj. 2
Healthy.
In horse management a sound horse is one with no health problems that might affect its suitability for its intended work.
v. 1
To produce a sound.
When the horn sounds, take cover.
n. 1
A sensation perceived by the ear caused by the vibration of air or some other medium.
He turned when he heard the sound of footsteps behind him. Nobody made a sound.

Related words

Word family: soundly soundness soundable soundboard sounded sounder soundful soundless
Phrases: sound off sound out sound symbolism safe and sound sound bite sound clip sound barrier sound recording
Is a kind of: valid sensation

Forms

Plural: sounds → noises, audios, straits, hearings…
Past participle: sounded
e.g. sounded → voiced, toned, uttered, vocalized…

Choose the right word

or Sound?

Sound is the sensation produced through the organs of hearing or the physical cause of this sensation. Sound is the most comprehensive word of this group, applying to anything that is audible.

J. C. Fernald, English Synonyms and Antonyms (1914)

Popularity over time

Word	1850 → 2019	Trend
sound		rising

Use in printed books, per decade from 1850 to 2019.

By length

2 letters: go¹
4 letters: just¹, good¹, well¹, feel¹, hard¹, true¹, test¹, fast¹, safe¹, deep¹, note¹, ring¹, wise¹, tone¹
5 letters: right¹, whole¹, phone¹, legal², voice¹, heavy², speak¹, fresh¹, solid², noise¹, audio³, valid², gauge¹, utter²
6 letters: report², strong¹, normal², robust², strait¹, fathom²
7 letters: healthy², correct², hearing², channel², measure², explore², examine³, logical³, earshot²
8 letters: catholic², rational³, sterling², sensible³, profound², orthodox³, flawless², reasoned², proclaim², resonate³, vocalize³, vocalise
9 letters: vibration³, wholesome², effectual
10 letters: reasonable⁴, convincing³, dependable⁴
11 letters: substantial³, intelligent⁴, undisturbed³

The small number after each word is its number of syllables (legal² = 2 syllables).