30 entries under mutter topic. ×

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, whisper)
8
buzz(verb, wait, shout, whistle, purr)
6
murmur(verb, whine, whisper, sing)
2
mumble(purr, whine, whisper, drone)
1
moan(state, express, voice, whine, whisper)
0
babble(whisper, mumble)
0
burble(whisper, mumble)
0
continuous sound(expression, whisper, mumble)
0
drip(whisper, mumble)
0
flow(whisper, mumble)
0
growl(whisper, mumble)
0
gurgle(whisper, mumble, warble)
0
make low(expression, whisper, mumble)
0
meander(whisper, mumble)
0
purl(whisper, mumble)
0
ripple(whisper, mumble)
0
rumble(whisper, mumble)
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APASmart Define. (2015). croon thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/croon/thesaurus/synonyms
ChicagoSmart Define. 2015. "croon thesaurus" https://smartdefine.org/croon/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, croon thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/croon/thesaurus/synonyms>.
MLASmart Define. "croon thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/croon/thesaurus/synonyms>