Reyser or Raiser: How To spell?

The word Reyser is misspelled against Raiser, a noun meaning "One who, or that which, raises (in various senses of the verb)."

Word contains consecutive vowels 'AI' in between alphabets r & ser is misspelled as 'EY'
Wrong Spelling:  r-ey-ser 
Correct Spelling:  r-ai-ser 
Explore spell check of Raiser to spell without errors.

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