Oddment is a term that refers to a remaining part or a leftover fragment. It could be a scrap, remnant, residue, or a trace. Another word that could be used synonymously with oddment is leftover, or a piece that is left over or unused. Additionally, "remainder" is another word that could be used to refer to something that is left over or not used up. The term "vestige" could also be used synonymously with oddment. It refers to a trace or visible sign of something that is no longer present. In conclusion, oddment is an umbrella term that could be replaced with numerous synonyms, depending on the context in which it's used.