Pennyweght or Pennyweight: How To spell?

The word Pennyweght is misspelled against Pennyweight, a noun meaning "A troy weight containing twenty-four grains, or the twentieth part of an ounce; as, a pennyweight of gold or of arsenic. It was anciently the weight of a silver penny, whence the name."

Word contains consecutive vowels 'EI' in between alphabets pennyw & ght is misspelled as 'E' as letter 'I' is phonetically igno
Wrong Spelling:  pennyw-e-ght 
Correct Spelling:  pennyw-ei-ght 
Explore spell check of Pennyweight to spell without errors.