There are several synonyms for the term "peripheral field" that can be used interchangeably depending on the context. Some of the common synonyms include "marginal zone," "outer edge," "fringe," "borderland," "perimeter," "boundary," and "edge territory." These words are often used to describe areas that are outside the central or dominant region of an object or idea. Peripheral fields can be found in various contexts such as science, geography, and even psychology. Regardless of the context, the central idea of peripheral fields remains the same, and the synonyms can be used to enhance the description of this concept.