The word Exceling is misspelled against Excelling, which is present continuous of "Excel"
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Excelling has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings exce & ing which should not be misspelled with single 'L'
Wrong Spelling: exce-l-ing
Correct Spelling: exce-ll-ing
Find more wrongly spelled words of Excelling to spell it well.