The word fixed is commonly used to describe something that is stable, stationary, or unchangeable. However, there are several synonyms that can be used in its place to add variety and depth to your writing. Some synonyms for fixed include permanent, constant, unalterable, immovable, rigid, established, steady, set, firm, and stubborn. Each of these words has its own nuances and connotations, which can help to convey a specific meaning or tone depending on the context. By incorporating synonyms for fixed into your writing, you can create more dynamic and engaging content that captures your readers' attention.