The word "luta" is a Portuguese term that means "fight" or "struggle." There are several synonyms that can be used to replace the term luta such as batalha, confronto, competição, combate, desafio, and luta corporal. Batalha refers to a battle between opposing sides, while confronto implies a clash of ideas or opinions. Competição, on the other hand, means competition, and combate refers to physical combat. Desafio implies a challenge, whereas luta corporal is used to describe a physical struggle or fight. These synonyms can be used interchangeably depending on the context of the sentence.