Outscourings is a rather uncommon word, but there are plenty of synonyms available to convey similar meanings. Some of the most common synonyms include waste, refuse, detritus, rubbish, debris, and garbage. Other options include litter, scraps, remnants, castoffs, and flotsam and jetsam. Essentially, any term that connotes discarded or unwanted material can serve as a synonym for outscourings. Depending on the context and intended connotation, different synonyms may be more appropriate. For example, litter may work well to describe random bits of trash on the side of a road, while rubbish might be better for more substantial waste items.