Flatmates, also known as roommates, housemates, or co-tenants, refer to the individuals who share a living space together. The term "flatmates" is commonly used in British English to refer to apartment mates or housemates. However, there are various other words synonymous to flatmates that can be used interchangeably. Roommates is a term that is predominantly used in American English and is understood worldwide. Housemates, on the other hand, is another term often used synonymously with flatmates, particularly in Australia. Co-tenants or co-residents can also refer to the individuals sharing accommodation. Other informal terms include bunkmates, padmates, or dormmates. Ultimately, the term used may depend on the region, accommodation type, or personal preference.