The word Thyroideyl is misspelled against Thyroideal, an adjective meaning "Thyroid."
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Thyroideal has vowels 'ea' together mispronounced as 'ey'
Word contains consecutive vowels 'EA' in between alphabets thyroid & l is misspelled as 'EY'
Wrong Spelling:  thyroid-ey-l 
Correct Spelling:  thyroid-ea-l 
Find more incorrect spellings of Thyroideal to spell right way.