33 entries under whisper topic. ×

19
sing(verb, sound, agree, allow, acknowledge)
17
hum(verb, wait, shout, buzz, whistle)
10
purr(verb, wait, shout, whistle, chant)
10
vocalize(verb, state, express, put, wait)
9
drone(verb, buzz, recite, purr)
8
buzz(verb, wait, shout, whistle, purr)
7
warble(noun, verb, sound, wait, shout)
6
trill(noun, verb, wait, shout, tune)
6
murmur(verb, whine, sing, mutter)
6
mutter(mumble, make a buzzing sound)
2
mumble(purr, whine, mutter, drone)
1
moan(state, express, voice, whine)
0
babble(mutter, mumble)
0
burble(mutter, mumble)
0
continuous sound(expression, mutter, mumble)
0
drip(mutter, mumble)
0
flow(mutter, mumble)
0
growl(mutter, mumble)
0
gurgle(mutter, mumble, warble)
0
make low(expression, mutter, mumble)
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APASmart Define. (2015). croon thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/croon/thesaurus/synonyms
ChicagoSmart Define. 2015. "croon thesaurus" https://smartdefine.org/croon/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, croon thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/croon/thesaurus/synonyms>.
MLASmart Define. "croon thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/croon/thesaurus/synonyms>