The word Stufer is misspelled against Stuffer, a noun meaning "One who, or that which, stuffs."
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Stuffer has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Stu & er which should not be misspelled with single 'F'
Wrong Spelling:  Stu-f-er 
Correct Spelling:  Stu-ff-er 
Check more misspelled words of Stuffer to spell it correct.