The word Chuming is misspelled against Chumming, which is present continuous of "Chum"
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Chumming has double "mm" is mispronounced as "m"
Remember double 'MM' in between the strings chu & ing which should not be misspelled with single 'M'
Wrong Spelling:  chu-m-ing 
Correct Spelling:  chu-mm-ing 
Check more misspelled words of Chumming to spell it correct.