Sandpaper, for one

• A tool or machine used for wearing down or smoothing or polishing
• A substance that abrades or wears down

Wiktionary Word definitions in Wiktionary
a. Tending to abrade; causing irritation; abrasive. n. A material used for grinding, as emery, sand, powdered glass, etc.; an abrasive.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Abradant \Ab*ra"dant\, n. A material used for grinding, as emery, sand, powdered glass, etc.

WordNet Word definitions in WordNet
n. a substance that abrades or wears down [syn: abrasive , abrasive material ] a tool or machine used for wearing down or smoothing or polishing [syn: abrader ]