Betternes or Betterness: How To spell?

The word Betternes is misspelled against Betterness, a noun meaning "The difference by which fine gold or silver exceeds in fineness the standard."

Betterness 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:  betterne-s 
Correct Spelling:  betterne-ss 
Explore spell check of Betterness to spell without errors.

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