The word Tun is misspelled against Tain, a noun meaning "Thin tin plate; also, tin foil for mirrors."
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Word contains consecutive vowels 'AI' in between alphabets t & n is misspelled as 'U'
Wrong Spelling:  t-u-n 
Correct Spelling:  t-ai-n 
Check more misspelled words of Tain to spell it correct.