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up quark
up-tempo
up-to-date
up-to-the-minute
Upanayana
Upanishad
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upheaval
up·heav·al [ up hv'l ] (plural up·heav·als)


noun 
Definition:
 
1. disturbance: a strong or sudden change in political, social, or living conditions
2. upward movement: a sudden raising of part of the Earth's crust
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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