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boom (1)
boom (2)
boom and bust
boom box
boom town
boom vang
boomer
boomerang
booming
booming ground
boomlet
boomslang
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booster rocket
boost·er rock·et (plural boost·er rock·ets)


noun 
Definition:
 
engine that gives thrust: an engine in a space vehicle that is used to give thrust during the launch
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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