The phrase "across-the-board" is commonly used to describe something that affects everyone or everything equally. However, there are many synonyms that can be used to convey the same meaning. Some examples include universal, indiscriminate, blanket, comprehensive, all-encompassing, inclusive, and across-the-range. These synonyms can be used interchangeably with "across-the-board" in various contexts such as politics, business, and education. Using different synonyms can add variety and nuance to your writing, making it more impactful and engaging for the reader. So, next time you need to express the idea of something affecting everything or everyone, you can choose from a range of synonyms to suit your specific purpose.