Retrogres or Retrogress: How To spell?

The word Retrogres is misspelled against Retrogress, a noun meaning "Retrogression."

Retrogress has double 'ss' in the end mispronounced as 's'
Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  retrogre-s 
Correct Spelling:  retrogre-ss 
Find more incorrect spellings of Retrogress to spell right way.

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