The best replacement for deflation is inflation.

The best alternatives to deflation are rated as following:
★★★★★  inflation
★★★★  disinflation
★★★  hyperinflation
★★  inflation 2011
★  inflation 2013
★  devaluation
★  inflation coming
★  recession
★  inflation 2012
★  stagflation
★  inflation during great depression
★  inflation 2014
★  inflation which is worse
  inflation better
  inflation worse
  inflation definition

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Speaking about deflation, one probably shouldn't forget about recession.

Other search terms related to deflation and their ratings are:
★★★★★ recession
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Google Trends

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deflation
inflation
disinflation