The larger version
Boom is just a "boom" while KAboom refers
to the "WOW" effect verison of boom. Something truly boom
Can sometimes be written with
multiple "o"'s such
Meaning an even larger
boom than kaboom.
Usually said with
a special voice or sounds. Putting weight on the "o"s.
ps: if you actually say this, you might be considered a retard
as it sounds pretty stupid saying this.
Also an onomatopoeia
of a huge explosion