Difference between Hum and Thrum

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 humming To drone like certain insects naturally do in motion, or sounding similarly To buzz, be busily active like a beehive To produce a low sounds blend continuously To reek, smell bad. To deceive, or impose on one by some story or device.

Example sentence: With my personal preparation at the piano, I can afford to hum at half voice.

Thrum

Part of speech: noun

Definition: A thrumming soundThe fringe of threads of warp left after cloth has been cut off of a loomAny short piece of yarn or rope

Part of speech: verb

Definition: To cause a steady rhythmic vibration, usually by plucking.