Mutually dependent is a term used in many different fields to describe a relationship between two or more things that rely on each other for survival. In some cases, this can refer to symbiotic relationships in which different species depend on each other to survive. In other cases, it may refer to economic relationships between individuals or nations. There are a variety of synonyms that can be used to describe this type of relationship, including interdependent, reciprocal, symbiotic, reliant, and closely connected. Ultimately, the exact term used will depend on the specific context in which it is being used and the connotations associated with each synonym.