- Buzz - Continuous murmur in a hive of activity? - Low noise - Sing with closed lips - Sing without words - To make a low, prolonged sound, like that of a bee in
flight; to drone; to murmur; to buzz; as, a top hums. - To make a nasal sound, like that of the letter m prolonged,
without opening the mouth, or articulating; to mumble in monotonous
undertone; to drone.
- Bustle (about) - Fly low and fast - Hum - Phone call - Sound of bees - Vibrant atmosphere - To make a low, continuous, humming or sibilant sound, like
that made by bees with their wings. Hence: To utter a murmuring sound;
to speak with a low, humming voice.