Linked from
The 8 pages that link to Bell pepper, each with the reason it gives.
Chili pepperCompared with: It belongs to the same species as many chili peppers but lacks pungency.
CapsicumBroader topic: It is a familiar sweet cultivar group without noticeable capsaicin heat.
Capsicum annuumBroader topic: It represents the species’ familiar non-pungent vegetable form.
GazpachoRelated: Green or red peppers add sweetness and vegetal flavor to many versions.