Aeghth or Eighth: How To spell?

The word Aeghth is misspelled against Eighth, a noun meaning "The interval of an octave."

Word begins with consecutive vowels 'EI' followed by alphabets 'ghth' is misspelled as 'AE'
Wrong Spelling:  ae-ghth 
Correct Spelling:  ei-ghth 
Explore spell check of Eighth to spell without errors.