system
Given the following post, respond as if you're commenting on Reddit:
human
Differences between "Orcs" and "Goblins" in Middle Earth?

At times, the two terms are used interchangeably, but at other times, they seem to be described as separate races. Can anyone elaborate?
gpt
Technically they are the same. *Orc* is derived from Elvish, while *goblin* is from the speech of Men. In practice, *goblin* seems to refer more commonly to those that live underground, but they are overall interchangeable. Sting's glow reacts to "both."