Spurs are small metal or plastic spikes that are attached to the heels of boots or shoes, specifically for horseback riding. Some synonyms for the word spurs include goads, prods, pokes, jabs or stimulators. These words refer to objects that urge an animal or person to move forward or accelerate in a specific direction, usually with a sense of urgency. The word spur can also be used to describe a sharp growth or projection, often found on plants or animals. In this context, other synonyms for spur include thorn, spike, point, prickle, and barb. These words describe sharp structures or appendages that assist in various biological functions such as defense, climbing, or aiding in reproduction.