Buzz
Part of speech: noun
Definition: A continuous, humming noise, as of bees; a confused murmur, as of general conversation in low tones, or of a general expression of surprise or approbation. A whisper; a report spread secretly or cautiously. The audible friction of voice consonants. A rush or feeling of energy or excitement. A telephone call.
Part of speech: verb
Definition: 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. To sound forth by buzzing. To whisper; to communicate, as tales, in an under tone; to spread, as report, by whispers, or secretly. To talk to incessantly or confidentially in a low humming voice. To fly very low over an airport or other location.
Example sentence: We could be playing a 10-person room or a 1500-person room, and if the crowd is reacting well, it doesn't matter what size it is. You still feel the buzz, you dig?
Hum
Part of speech: noun
Definition: A hummed tune, i.e. created orally with lips closed.An often indistinct sound resembling human humming.Busy activity, like a beehive's buzz
Part of speech: verb
Definition: To make a sound from the vocal chords without pronouncing any real words, with one's lips closed.To express of affect by hummingTo drone like certain insects naturally do in motion, or sounding similarlyTo buzz, be busily active like a beehiveTo produce a low sounds blend continuouslyTo reek, smell bad.To deceive, or impose on one by some story or device.
Example sentence: When you're on stage you have a very strange knowledge of what the audience is. It isn't exactly a sound - it's a hum, like the streets.