Stufiness or Stuffiness: How To spell?
The word Stufiness is misspelled against Stuffiness, a noun meaning "The quality of being stuffy."
Stuffiness has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Stu & iness which should not be misspelled with single 'F'
Wrong Spelling:  Stu-f-iness  Correct Spelling:  Stu-ff-iness 
Check more misspelled words of Stuffiness to spell it correct.