Tuf or Tuff: How To spell?
The word Tuf is misspelled against Tuff, a noun meaning "Same as Tufa."
Tuff has double 'ff' in the end mispronounced as 'f'Remember double 'FF' appears in the end of this word which should not be misspelled with single 'F'
Wrong Spelling:  tu-f  Correct Spelling:  tu-ff 
Check more misspelled words of Tuff to spell it correct.