It's not easy to kill a god, but there are ways. Listed here are all deities thought or known to be dead.
“Curchanus is a mostly-forgotten god who reigned over beasts, travel, and endurance. While Desna...Curchanus
“Lissala (pronounced lis-SALL-uh) was once a major religious force in the empire of Thassilon...Lissala
“The warrior-goddess Arazni was the herald of Aroden, and the patron saint of the Knights of Ozem...Arazni
“The mysterious god known only as the Peacock Spirit had much to do with the rise of the empire...Peacock Spirit
“Dou-Bral was the son of the spirit-wolf Thron, and half-brother of the goddess Shelyn. Together...Dou-Bral
“A spirit-wolf in primordial times, Thron was one of the most powerful of his kind. He was known...Thron