Free business can refer to a variety of things such as a no-cost business model, a company that offers free services or products, or an enterprise that operates without restrictions. Synonyms for "free business" could include terms like independent business, self-owned business, or startup. Other options might include cost-free enterprise, open business, or liberated company. Depending on the context, other words could be used to describe a free business such as unencumbered, unrestricted, autonomous, or unrestrained. Ultimately, the most appropriate synonym for "free business" will depend on the specific meaning and usage of the term in relation to the larger conversation at hand.