Synonyms for the word pancratiast are hard to come by, as it is an archaic term that refers to an athlete who competes in pancratium, an ancient form of mixed martial arts. However, some words that may be used as synonyms for pancratiast are gladiator, fighter, combatant, wrestler, pugilist, and warrior. These words all convey the idea of an individual who is skilled in physical combat and willing to compete in order to prove their prowess. While some of these words have more contemporary connotations than others, they all share the common trait of describing someone who is a formidable opponent in battle.