Stanofluoride or Stannofluoride: How To spell?
The word Stanofluoride is misspelled against Stannofluoride, a noun meaning "Any one of a series of double fluorides of tin (stannum) and some other element."
Stannofluoride has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings sta & ofluoride which should not be misspelled with single 'N'
Wrong Spelling:  sta-n-ofluoride  Correct Spelling:  sta-nn-ofluoride 
Check more misspelled words of Stannofluoride to spell it correct.