Synonyms: grumble, grumbling, murmur, murmuring, mutter, muttering
Definition: a complaint uttered in a low and indistinct tone
Similar words: complaint
Definition: an expression of grievance or resentment
Synonyms: rumble, rumbling, grumble, grumbling
Definition: a loud low dull continuous noise
Usage: they heard the rumbling of thunder
Similar words: noise
Definition: sound of any kind (especially unintelligible or dissonant sound)
Usage: he enjoyed the street noises; they heard indistinct noises of people talking; during the firework display that ended the gala the noise reached 98 decibels
Definition: continuous full and low-pitched throbbing sound
Usage: the rumbling rolling sound of thunder
Similar words: full
Definition: (of sound) having marked deepness and body
Usage: full tones; a full voice