Since we can't include links, I'll give you the basics ... taken from seriouseats dot com.
The Differences Between Homemade Chicken Stock and Chicken Broth
But from a classical French perspective, culinary experts agree on a few key distinctions between broth and stock made from scratch. “The very short answer [to their difference] is gelatin,” Farone says. “This is a bit of a hyper-generalization, but in essence, stocks are made from bones, and broths are made from meat.
The Role of Gelatin
When animal bones are cooked in water, connective tissues like the cartilage and tendons release their collagen, which transforms into gelatin. The gelatin turns the liquid viscous and silky, resulting in a wiggly, wobbly mass when chilled. This product would be considered culinary stock. Broth, on the other hand, is classically made by simmering meat without bones, which can give the liquid a “meatier” flavor and aroma, but allows it to stay fluid and light bodied, even when chilled.
I have used the terms broth and stock interchangeably, so this was new information, and thought I'd pass it along.