upsurge

[v. uhp-surj; n. uhp-surj]
verb (used without object), upsurged, upsurging.
1.
to surge up; increase; rise: Water upsurged. Crime upsurged.
noun
2.
the act of surging up; a large or rapid increase: an upsurge in sales.

Origin:
1915–20; up- + surge

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
upsurge
 
vb
1.  literary chiefly (intr) to surge up
 
n
2.  a rapid rise or swell

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

upsurge
1928, from up- + surge.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The debate has grown so ugly that researchers say they are being threatened if
  they question evidence of an upsurge in autism.
Many people regard this upsurge as a sign of health.
And that vaccination is responsible for the enormous upsurge of cancer in our
  world.
But geologists point to an upsurge in seismic activity last year as a sign of
  an imminent eruption.
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