The word Overheird is misspelled against Overheard, which is past tense of "Overhear"
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Overheard has vowels 'ea' together mispronounced as 'ei'
Word contains consecutive vowels 'EA' in between alphabets overh & rd is misspelled as 'EI'
Wrong Spelling:  overh-ei-rd 
Correct Spelling:  overh-ea-rd 
Find more wrongly spelled words of Overheard to spell it well.