"Set by" is a common phrase used in various contexts to denote a pre-established standard or expectation. However, if you want to expand your vocabulary and convey the same meaning in alternative ways, there are numerous synonyms available. Some of the synonyms you can use instead of "set by" include "established," "determined," "fixed," "prescribed," and "prearranged." These words can be used interchangeably with "set by" in various contexts, such as performance standards, rules and regulations, expectations, or requirements. By utilizing alternative synonyms, you can enhance your language skills and effectively communicate with your audience without being repetitive or monotonous.