The term 'Action Hero' is often associated with a brave, strong and fearless protagonist in movies who fights villains and saves the day. However, there are various synonyms that are used to describe such a character. The most common ones include 'adventurer', 'champion', 'warrior', 'hero', 'protector', 'defender' and 'savior'. These words are used to define the character's traits and the role they play in the story, making them relatable and easier to understand for the audience. With the evolution of the genre, new terms like 'superhero', 'spy', 'agent', 'mercenary' and 'vigilante' have also emerged to describe the contemporary 'Action Hero' characters in movies, TV series and comics.