Scour out is a term used to describe the action of cleaning something thoroughly usually with the use of an abrasive substance or tool. There are several words that can be used as synonyms for scour out, such as scrub, cleanse, polish, buff, scour, and clean. Each of these words represents a different level or intensity of cleaning, but they all share the same objective of making something clean and free from dirt or grime. Depending on the context, certain words may be more appropriate than others in describing the level of cleaning required. Overall, these synonym choices offer various options to convey an effective description of cleaning something out.