Nonplusing or Nonplussing: How To spell?

The word Nonplusing is misspelled against Nonplussing, which is present continuous of "Nonplus"

Nonplussing has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings nonplu & ing which should not be misspelled with single 'S'
Wrong Spelling: nonplu-s-ing
Correct Spelling: nonplu-ss-ing
Check more misspelled words of Nonplussing to spell it correct.