The word Stopering is misspelled against Stoppering, which is present continuous of "Stopper"
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Stoppering has double "pp" is mispronounced as "p"
Remember double 'PP' in between the strings sto & ering which should not be misspelled with single 'P'
Wrong Spelling: sto-p-ering
Correct Spelling: sto-pp-ering
Find more incorrect spellings of Stoppering to spell right way.