The phrase "am based on" refers to a statement or fact that has its foundation in a particular source or point of view. Some synonyms for this phrase include "stem from," "derive from," "originate from," or "spring from." These words express a similar concept of finding the root cause or underlying reasoning behind something. They can be used interchangeably in many cases, but it is important to note that certain contexts may call for the use of a specific synonym to best convey meaning. No matter which word you choose, they all convey the idea that something has its starting point in a specific place or point of origin.