Steady-state refers to a state in which a system is in equilibrium or a stable condition. Some synonyms for steady-state include stable, unchanging, constant, consistent, and continual. The word stable implies a state in which something remains unchanged, while unchanging indicates that nothing has changed over time. Constant refers to something that remains the same despite external influences, while consistent implies that something is reliable and predictable. Continual refers to something that happens without stopping or pausing indefinitely. All these synonyms for steady-state can be used interchangeably to describe a system that is in a stable and unchanging state, whether it be in physics, economics, or any other field.