bombination(n = noun.event) bombilation, buzz - sound of rapid vibration; "the buzz of a bumble bee"
is a kind of sound
Derived form verb bombinate₁

   A humming or buzzing. [1913 Webster]

N  roll, drumming, berloque, bombination, rumbling, tattoo, drumroll, dingdong, tantara, rataplan, whirr, ratatat, ratatat-tat, rubadub, pitapat, quaver, clutter, charivari, racket, cuckoo, repetition, peal of bells, devil's tattoo, reverberation, clickety-clack, hum, purr, hummingbird, cat, kitten (animal sounds), rolling, monotonous, like a bee in a bottle.