The word Hyoidein is misspelled against Hyoidean, an adjective meaning "Same as Hyoid, a."
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Hyoidean has vowels 'ea' together mispronounced as 'ei'
Word contains consecutive vowels 'EA' in between alphabets hyoid & n is misspelled as 'EI'
Wrong Spelling:  hyoid-ei-n 
Correct Spelling:  hyoid-ea-n 
Find more incorrect spellings of Hyoidean to spell right way.