1. (noun) boom, roar, roaring, thunder
a deep prolonged loud noise
Synonyms: thunder, microphone boom, nose drops, bellowing, bellow, scag, hollo, gravy, godsend, bonanza, holla, yowl, big H, hell dust, hollering, holler, gold rush, windfall, smack, manna from heaven, roar, bunce, roaring, boom, holloa, skag
2. (noun) boom
a state of economic prosperity
Synonyms: thunder, bonanza, roar, microphone boom, windfall, gravy, gold rush, godsend, manna from heaven, roaring, bunce
3. (noun) 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)
Synonyms: miraculous food, thunder, bonanza, roar, microphone boom, boom, windfall, gravy, pan gravy, gold rush, godsend, manna from heaven, manna, roaring, bunce
4. (noun) boom, microphone boom
a pole carrying an overhead microphone projected over a film or tv set
Synonyms: thunder, bonanza, roar, microphone boom, boom, windfall, gravy, gold rush, godsend, manna from heaven, roaring, bunce
5. (verb) 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
Synonyms: thunder, bonanza, roar, microphone boom, windfall, gravy, gold rush, godsend, manna from heaven, roaring, bunce
6. (verb) boom, din
make a resonant sound, like artillery
Synonyms: thunder, blast, thrive, din, boom, expand, smash, nail, boom out, flourish
7. (verb) smash, nail, boom, blast
hit hard
Synonyms: boom out, cop, shoot, crush, bankrupt, complete, thunder, nail, nail down, pass with flying colors, smash, arrest, bang up, nab, din, smash up, ruin, boom, demolish, pillory, break, breeze through, ace, blare, sweep through, sail through, pinpoint, collar, apprehend, savage, peg, thrive, pick up, expand, flourish, crucify, blast, dash, knock down, shell
8. (verb) thunder, boom
be the case that thunder is being heard
Synonyms: thrive, flourish, thunder, blast, boom, din, expand, smash, nail, roar, boom out
9. (verb) boom, boom out
make a deep hollow sound
Synonyms: thunder, blast, thrive, din, boom, expand, smash, nail, boom out, flourish
10. (verb) boom, thrive, flourish, expand
grow vigorously
Synonyms: elaborate, wave, fly high, expound, exposit, flourish, spread out, blast, amplify, lucubrate, blow up, thrive, din, extend, inflate, expatiate, nail, brandish, flesh out, dilate, thunder, boom, enlarge, prosper, expand, boom out, smash
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Synonyms for boom 
