Flatnes or Flatness: How To spell?

The word Flatnes is misspelled against Flatness, a noun meaning "Depression of tone; the state of being below the true pitch; -- opposed to sharpness or acuteness."

--> Flatness 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:  flatne-s 
Correct Spelling:  flatne-ss 
Explore spell check of Flatness to spell without errors.

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