Oooh, I feel better now (not knowing the difference, if any, between the two):
Woodchucks vs. Groundhogs: Are They the Same Animal?

How Did the Groundhog/Woodchuck Get Its Name?
The name “groundhog” is one of many names used to describe the large rodent that lives in wooded areas around North America. This name was thought to originally be spaced into two words (groundhog) since it roots through the ground, and “hog” was used not to mean swine, but rather just “animal.”

The name “woodchuck” comes mostly from the Native American word “Wuchak,” which means, roughly, “digger.” The word developed into the name as we know it, and the names are used interchangeably, even in scientific reports on the groundhog/woodchuck. There are other Native American words that sound similar to “wuchak,” and it’s possible that “woodchuck” is a combination of all of them.

Most people assume, perhaps due to the common tongue-twister “how much wood could a woodchuck chuck if a woodchuck could chuck wood,” or just from the name, that woodchucks chew on trees.
Since you might be wondering, NO woodchucks can’t actually chuck wood. You can read an article we wrote (yes, we really did) about that here.