Rubing or Rubbing: How To spell?
The word Rubing is misspelled against Rubbing, an adjective meaning "from Rub, v."
Rubbing has double "bb" is mispronounced as "b"Remember double 'BB' in between the strings Ru & ing which should not be misspelled with single 'B'
Wrong Spelling:  Ru-b-ing  Correct Spelling:  Ru-bb-ing 
Check more misspelled words of Rubbing to spell it correct.