So it is music with rap, I assume - the point is, if there is just the human voice, things are much easier then if it’s a finished mix with low beats and high cymbals, so to speak. You could try to obscure the profanity by copying parts of the same track over it, but that’s quite tedious. You could also reverse the particular words, but this is ofcourse much more noticeable, since the music will also be reversed for that short period. Another option is to add/mix a tone over the words.