Mainstream audience refers to the general public or the majority of the population. However, there are other synonyms that can be used interchangeably with this word. These include the masses, the general public, mainstream viewers, and the wider public. Additionally, the term "mainsteam audience" can also be referred to as the target audience, which is the group of people to whom a particular product or service is being promoted. It is crucial to understand the appropriate synonyms to use when targeting a specific audience for a specific communication or marketing campaign. The right choice of words can attract and engage the desired audience and increase the chances of success.