The term "side split" refers to a tear or a rip on the side of a garment or fabric. However, there are several synonyms for this term that can be used interchangeably. Some of these include "side tear," "side cut," "side burst," "side rip," "side slash," and "side gash." Each of these terms essentially refers to the same thing, but they may have different connotations depending on context. For example, "side slash" might suggest a deliberate cut or design element, while "side rip" could suggest accidental damage. Regardless, all of these synonyms describe a tear or cut on the side of something.