Concentrativenes or Concentrativeness: How To spell?
The word Concentrativenes is misspelled against Concentrativeness, a noun meaning "The faculty or propensity which has to do with concentrating the intellectual the intellectual powers."
Concentrativeness 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:  concentrativene-s  Correct Spelling:  concentrativene-ss 
Find more incorrect spellings of Concentrativeness to spell right way.