The word Stubing is misspelled against Stubbing, which is present continuous of "Stub"
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Stubbing has double "bb" is mispronounced as "b"
Remember double 'BB' in between the strings Stu & ing which should not be misspelled with single 'B'
Wrong Spelling: Stu-b-ing
Correct Spelling: Stu-bb-ing
Check more misspelled words of Stubbing to spell it correct.