Hummed, past participle of hum. Synonyms in the same form.
Buzz
buzzed, whirred, bumbled
Bustle
bustled, hustled
Smell
smelt, reeked, funked
Sweet-talk
sweet-talked, inveigled, blandished, tweedled
Other
thrummed, crooned, murmured, droned, warbled, caroled, seethed, wizzed, bombinated
All synonyms for hum →