Mass medium is a broad term that refers to any form of communication that has the ability to reach a large audience. This includes traditional forms of media such as television, radio, newspapers, and magazines. However, with the rise of digital media, there are now many other synonyms for mass medium, including social media, online news sites, podcasts, streaming services, and video sharing platforms. These newer forms of media allow for more personalization and interactivity than traditional means, but still have the potential to reach a mass audience. Overall, mass medium encompasses any means of communication that has the ability to disseminate information to a wide range of people.