The word Dub is misspelled against Dubb, a noun meaning "The Syrian bear. See under Bear."
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Dubb has double 'bb' in the end mispronounced as 'b'
Remember double 'BB' appears in the end of this word which should not be misspelled with single 'B'
Wrong Spelling:  du-b 
Correct Spelling:  du-bb 
Check more misspelled words of Dubb to spell it correct.