An opossum is known to be a type of marsupial. This type of marsupial can be found in different parts of America. The possum, on the other hand, is a type of marsupial that can be found in Australia. There are also other countries wherein the possum can also be found.
Some people think that these two animals are the same probably because when you say their names, they sound the same. One main difference is their relation to kangaroos. Possums are obviously more related to kangaroos.