Backspacer is a term that describes an item or an object that helps in separating or spacing objects or surfaces in the back. Some synonyms for the word backspacer include 'separating tool', 'spacer', 'separator', 'distance keeping tool', 'shim', and 'gasket'. These synonyms vary in terms of their usage and applicability, but they all serve the purpose of creating distance between objects or surfaces. The use of backspacer is common in various industries including engineering, construction, and manufacturing. The choice of synonym to be used often depends on the context and the specific application required. Regardless, they all serve to make the separation or spacing process more efficient and effective.