The .edu domain is specifically designed for educational institutions such as universities, colleges, and schools. However, there are several synonyms that can be used interchangeably with .edu. For instance, you can use .edu extension, .edu domain, .edu web address, or .edu web domain. These synonyms convey the same meaning as the original term and can be useful when you want to address an educational institution or find information about a particular school or program. It's essential to note that only recognized and accredited educational institutions are eligible to use the .edu domain, which assures the authenticity and credibility of the information.