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There are no exact homophones for "role." However, similar-sounding words include "roll" and "rowl."
It depends how Raoul is pronounced. Rowl: fowl, scowl, bowel, trowel, towel, et al. Ra-ool: Nothing.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern ROWL--K. That is, seven letter words with 1st letter R and 2nd letter O and 3rd letter W and 4th letter L and 7th letter K. In alphabetical order, they are: rowlock