Winowing or Winnowing: How To spell?
The word Winowing is misspelled against Winnowing, a noun meaning "The act of one who, or that which, winnows."
Winnowing has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings wi & owing which should not be misspelled with single 'N'
Wrong Spelling:  wi-n-owing  Correct Spelling:  wi-nn-owing 
Find more incorrect spellings of Winnowing to spell right way.