Devourer and Omnivore

Devourer noun - Someone who eats greedily or voraciously.

Omnivore and devourer are semantically related In some cases you can use "Omnivore" instead a noun "Devourer".

Omnivore noun - An animal that feeds on both animal and vegetable substances.

Devourer and omnivore are semantically related in one who consumes all foods topic. You can use "Devourer" instead a noun "Omnivore".