Subsistent is a term that often refers to something that exists independently or is self-sufficient. However, there are several synonyms that can be used to describe this concept. Some of the alternatives for subsistent include self-sustained, self-sufficient, autonomous, independent, self-sustaining, self-contained, self-supporting, and self-standing. These words all convey a sense of self-reliance and self-sufficiency. They all imply that something can maintain its existence without external help or support. Thus, whether you are writing an essay or looking for a different way to describe a concept, these synonyms can come in handy.