The DICT Development Group

  upsurge
      n 1: a sudden forceful flow [syn: rush, spate, surge,
           upsurge]
      2: a sudden or abrupt strong increase; "stimulated a surge of
         speculation"; "an upsurge of emotion"; "an upsurge in violent
         crime" [syn: surge, upsurge]

  127 Moby Thesaurus words for "upsurge":
     access, accession, accretion, accrual, accruement, accumulation,
     addition, advance, aggrandizement, amplification, anabasis,
     appreciation, arise, ascend, ascension, ascent, augment,
     augmentation, ballooning, bloating, boom, boost, broadening, build,
     buildup, clamber, climb, climbing, come up, crescendo,
     curl upwards, development, edema, elevation, enlarge, enlargement,
     escalade, expand, expansion, extension, flood, fountain, gain,
     go up, greatening, grow up, growth, gush, gyring up, heighten,
     hike, increase, increment, inflation, jet, jump, leap, levitate,
     levitation, loom, mount, mounting, multiplication, multiply,
     productiveness, proliferation, raise, rear, rear up, rise, rise up,
     rising, rocketing up, saltation, shooting up, snowballing, soaring,
     spiral, spire, spout, spread, spring, spurt, stand up, surge,
     swarm up, sweep up, swelling, takeoff, taking off, tower,
     tumescence, up, upclimb, upcoming, updraft, upgang, upgo, upgoing,
     upgrade, upgrow, upgrowth, upheave, uphill, upleap, uplift, upping,
     uprisal, uprise, uprising, uprush, upshoot, upslope, upspin,
     upstream, upsurgence, upswarm, upsweep, upswing, uptrend, upturn,
     upwind, vault, wax, waxing, widening, zooming