The word "bullet" can be replaced with several synonyms that can be used in different contexts. One of the popular synonyms for bullet is "projectile." Another alternative for bullet is "ammunition," which is more broadly used to describe the materials required for firearms. Additionally, the phrase "rounds," is also used interchangeably for bullets. "Slug" is another synonym used for bullets, especially in the context of hunting. In the military context, "cartridge" is frequently used instead of a bullet. Synonyms for bullet depend on the situations and contexts in which the term is used.