S: (n) boom, bonanza, gold rush, gravy, godsend, manna from heaven, windfall, bunce (a sudden happening that brings good fortune (as a sudden opportunity to make money)) "the demand for testing has created a boom for those unregulated laboratories where boxes of specimen jars are processed like an assembly line"
S: (n) boom, microphone boom (a pole carrying an overhead microphone projected over a film or tv set)
S: (n) boom (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)