Heughtened or Heightened: How To spell?

The word Heughtened is misspelled against Heightened, which is past tense of "Heighten"

Word contains consecutive vowels 'EI' in between alphabets h & ghtened is misspelled as 'EU'
Wrong Spelling:  h-eu-ghtened 
Correct Spelling:  h-ei-ghtened 
Check more misspelled words of Heightened to spell it correct.