Propylaia or Propylaea: How To spell?

The word Propylaia is misspelled against Propylaea, which is plural of "Propylaeum"

Propylaea has vowels 'ae' together mispronounced as 'ai'
Word contains consecutive vowels 'AE' in between alphabets propyl & a is misspelled as 'AI'
Wrong Spelling:  propyl-ai-a 
Correct Spelling:  propyl-ae-a 
Find more incorrect spellings of Propylaea to spell right way.

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