Effectivenes or Effectiveness: How To spell?

The word Effectivenes is misspelled against Effectiveness, a noun meaning "The quality of being effective."

Effectiveness 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:  effectivene-s 
Correct Spelling:  effectivene-ss 
Find more wrongly spelled words of Effectiveness to spell it well.

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