Extensivenes or Extensiveness: How To spell?
The word Extensivenes is misspelled against Extensiveness, a noun meaning "The state of being extensive; wideness; largeness; extent; diffusiveness."
Extensiveness 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:  extensivene-s  Correct Spelling:  extensivene-ss 
Find more wrongly spelled words of Extensiveness to spell it well.