There are several synonyms for "fire eater" depending on the context. In the circus or performance industry, a fire-eater may also be referred to as a fire performer, fire breather, or a pyrotechnician. In a military or political context, a fire-eater may refer to a person who is advocate for aggressive or confrontational actions, and in this case, synonyms could include warmonger, belligerent, or hawk. In general, other words that could be used to describe a fire-eater may include daredevil, risk-taker, or adrenaline junkie. It all depends on the context and the connotation that is being conveyed.