Land-locked is a term used to describe a country or region that is surrounded by land and has no access to the sea. There are various synonyms for this term, including interior, enclosed, and land-bound. These words are often used interchangeably to describe a country that is situated entirely within the confines of the surrounding landmass, with no access to the sea or any other water body. Additionally, some other words that can be used as synonyms for 'land-locked' are isolated, surrounded, trapped, and inland. These words can be used to describe countries that are cut off from the rest of the world, or regions that are inaccessible due to geographical barriers.