The word Rehaersing is misspelled against Rehearsing, which is present continuous of "Rehearse"
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Rehearsing has vowels 'ea' together mispronounced as 'ae'
Word contains consecutive vowels 'EA' in between alphabets reh & rsing is misspelled as 'AE'
Wrong Spelling:  reh-ae-rsing 
Correct Spelling:  reh-ea-rsing 
Find more wrongly spelled words of Rehearsing to spell it well.