boom

noun

1.
a deep prolonged loud noise
roar roaring thunder
Derived from:
boom
2.
a state of economic prosperity
Derived from:
boom
3.
a sudden happening that brings good fortune (as a sudden opportunity to make money)
bonanza bunce godsend gold rush gravy manna from heaven windfall
4.
a pole carrying an overhead microphone projected over a film or tv set
microphone boom
5.
any of various more-or-less horizontal spars or poles used to extend the foot of a sail or for handling cargo or in mooring