Geon or Gain: How To spell?

The word Geon is misspelled against Gain, a noun meaning "A square or beveled notch cut out of a girder, binding joist, or other timber which supports a floor beam, so as to receive the end of the floor beam."

Word contains consecutive vowels 'AI' in between alphabets g & n is misspelled as 'EO'
Wrong Spelling: g-eo-n
Correct Spelling: g-ai-n
Find more incorrect spellings of Gain to spell right way.