Chieftun or Chieftain: How To spell?

The word Chieftun is misspelled against Chieftain, a noun meaning "A captain, leader, or commander; a chief; the head of a troop, army, or clan."

Word contains consecutive vowels 'AI' in between alphabets chieft & n is misspelled as 'U'
Wrong Spelling:  chieft-u-n 
Correct Spelling:  chieft-ai-n 
Check more misspelled words of Chieftain to spell it correct.

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