Yes, "bur" is a real word. It can refer to a few different things:
- In botany, a "bur" is a seed or dry fruit that has hooks or prickles, allowing it to cling to fur or clothing for dispersal.
- It can also refer to a type of abrasive tool used in dental or machining applications, known as a bur or burr.
- In some dialects, it may refer to a rounded, roughened area, particularly on skin or a surface.
If you have a specific context in mind, I can provide more detailed information!