The sound of a whip is usually described as a crack.
"The whip artist cracked his whip and the small tube of paper protruding from his pretty assistant's mouth was sliced in two!"
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The sound of a bullwhip is a "crack," or possibly a "snap," but there does not seem to be a separate sound for the impact of a lash.
A bullwhip works like an extension of a human hand to speed the thinner-half of the whip and then rapidly change the direction of movement. When the change occurs, the tip of the whip actually breaks the sound barrier and makes the crack! of the whip.
The likely word is spelled crack, with several meanings, including a crevice in a flat surface, or the sound of a bullwhip, gunshot, or thunder.
The sound of the crack! of a bullwhip is the tip of the whip breaking the sound barrier and creating a small sonic boom. The shockwave is perceived as the crack! of the whip. In that light, yes, the bullwhip can create a sonic boom.
rowr!
Varooooom
Ka-ching!
The sound a rooster makes is typically spelled as "cock-a-doodle-doo."
Baa.
vroom
Unnh!
The typical written expression for a yawn sound is "ho hum."