Leaness or Leanness: How To spell?
The word Leaness is misspelled against Leanness, a noun meaning "The condition or quality of being lean."
Leanness has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings lea & ess which should not be misspelled with single 'N'
Wrong Spelling:  lea-n-ess  Correct Spelling:  lea-nn-ess 
Explore spell check of Leanness to spell without errors.