The word Roweling is misspelled against Rowelling, which is present continuous of "Rowel"
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Rowelling has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings rowe & ing which should not be misspelled with single 'L'
Wrong Spelling:  rowe-l-ing 
Correct Spelling:  rowe-ll-ing 
Find more incorrect spellings of Rowelling to spell right way.