Who or what is Providence in Chapter 32 of The Adventures of Huckleberry Finn?providence
Providence is just another way of saying "God." In the chapter you mention, you can see that this makes sense. We are told that Huck trusts in Providence to put the right words in his mouth when he needs them. He says that he has found that Providence will do that if he just lets it.
The word does not necessarily have to refer to God. It can also just be fate or nature. But the idea is that it is someone who is watching out for you -- something supernatural. So something is putting the right words in his mouth -- God or something else supernatural that cares about Huck.