Armor-bearer is a term that refers to a person who carries and maintains the armor of a soldier or a knight. There are plenty of other terms that can be used as synonyms for armor-bearer, such as esquire, squire, attendant, retainer, aide-de-camp, or valet. All of these words carry a similar meaning and are often used interchangeably. In some cases, these synonyms may refer to a broader range of duties, including general support and assistance to a leader or person of importance. Ultimately, the use of these synonyms depends on the context and the level of formality required in a given situation.