The word Stuner is misspelled against Stunner, a noun meaning "One who, or that which, stuns."
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Stunner has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings stu & er which should not be misspelled with single 'N'
Wrong Spelling: stu-n-er
Correct Spelling: stu-nn-er
Check more misspelled words of Stunner to spell it correct.