Adeptnes or Adeptness: How To spell?
The word Adeptnes is misspelled against Adeptness, a noun meaning "The quality of being adept; skill."
Adeptness 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:  adeptne-s  Correct Spelling:  adeptne-ss 
Explore spell check of Adeptness to spell without errors.