Viceregent, or vicegerent, refers to a person who acts as a representative of a higher authority, typically a monarch or deity. Synonyms for this term include deputy, lieutenant, emissary, proxy, substitute, and stand-in. These words all convey the idea of someone acting in place of another. Other synonyms for viceregent include steward, guardian, and overseer, which emphasize the person's responsibility for managing and protecting a particular domain or territory. In religious contexts, viceregent may be replaced with terms like apostle, prophet, or messenger, which suggest a higher calling or divine inspiration.