There are several synonyms for the word "ravener," which typically refers to something that devours or consumes something else. Some of the most common synonyms include "predator," "plunderer," "pillage," "raider," "hijacker," and "invader." Each of these words has a slightly different connotation, but they all suggest a person, animal, or object that takes something from another without permission or regard for its well-being. Other possible synonyms include "eater," "gobbler," "conqueror," and "taker," all of which can be used to describe someone or something that consumes or takes possession of something.