Ighty or Eighty: How To spell?

The word Ighty is misspelled against Eighty, a noun meaning "A symbol representing eighty units, or ten eight times repeated, as 80 or lxxx."

Word begins with consecutive vowels 'EI' followed by alphabets 'ghty' is misspelled as 'I' as letter 'E' is phonetically ignored
Wrong Spelling:  i-ghty 
Correct Spelling:  ei-ghty 
Navigate all incorrect spellings of Eighty to spell it right.