Punstaker or Painstaker: How To spell?

The word Punstaker is misspelled against Painstaker, a noun meaning "One who takes pains; one careful and faithful in all work."

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

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