Stethman or Staithman: How To spell?

The word Stethman is misspelled against Staithman, a noun meaning "A man employed in weighing and shipping at a staith."

Word contains consecutive vowels 'AI' in between alphabets st & thman is misspelled as 'E'
Wrong Spelling:  st-e-thman 
Correct Spelling:  st-ai-thman 
Explore spell check of Staithman to spell without errors.

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