Paynstaker or Painstaker: How To spell?

The word Paynstaker 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 'AY'
Wrong Spelling:  p-ay-nstaker 
Correct Spelling:  p-ai-nstaker 
Explore spell check of Painstaker to spell without errors.

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