Why is paprika named differently from bell pepper?

Even before being domesticated, six to eight thousand years ago, chilis had found a way to spread over more land and proliferate more widely by using birds as their seed carriers. Not only do birds fly and can spread the seeds over long distances but they also swallow the fruit whole, which keeps the seeds intact and allows them to germinate once they are “dropped”.

If you want to add a nice spicy kick without all the overpowering heat, chili powder is a suitable sweet paprika substitute. Despite that, you can’t use chili powder in a 1:1 substitution because of its noticeable savory flavor that comes from a mix of other spices such as onion powder, cumin, garlic, and more. In general, it has an earthy, savory, and slightly spicy taste. But it will do if you’re in a bind or in the middle of garnishing your deviled eggs and curries. 

Substitutes for Sweet Paprika: 

RED PEPPER FLAKES SUBSTITUTES