A baseline is typically defined as a starting point or a reference point, often used in scientific research or data analysis. There are several synonyms for this term, such as starting point, reference line, benchmark, foundation, and fundamental point. The term "base-level" can also be used interchangeably with base-line, as it refers to the lowest point in a system or process. In addition, the terms "base year" and "base period" are commonly used in economic analysis to denote a specific time period used as a comparison for subsequent data analysis. Regardless of the specific context, all of these terms imply an initial point of reference or a fundamental measure upon which subsequent analysis can be based.