There are various synonyms for the phrase "fix limit" that can be used to convey the same meaning. Some of the synonyms for "fix limit" include cap, set a boundary, restrict, establish a maximum, confine, and place a ceiling. These terms are often used in different fields, including finance, politics, and sports. "Cap" and "place a ceiling" are frequently used in financial contexts, often referring to a specific amount or value that cannot be exceeded. "Set a boundary" and "restrict" are commonly used in political discussions, referring to the establishment of legal limits. Meanwhile, "establish a maximum" and "confine" are used in sports, referring to physical boundaries and limits.