murmuring Synonyms

muttering susurrant grumbling grumble murmuration whispering mussitation mutter murmur purring rumble rippling peevish querulous plashing purling purl rustling sigh sotto voce in a low voice murmurs Grumbles in a whisper soughing burbling burble whisper whining undertone trolling trickling susurrous susurration in low tones gurgle discontented croaking crabbing complaintful complaint complain complaining buzz buzzing bubbling babblement babble drone droning