Smooth-running is a term that is often used to describe the efficient and seamless operation of a system, process or organization. Synonyms for smooth-running include streamlined, effortless, easy-going, well-oiled, efficient, uninterrupted, and seamless. These synonyms all convey the idea of something that is operating smoothly and without any interruptions or inefficiencies. They can be used in a variety of contexts, such as to describe a well-organized business, a streamlined supply chain, or a smoothly functioning team. Whether you are looking for a different way to describe a successful enterprise or seeking to improve your own business operations, these synonyms for smooth-running are sure to come in handy.