An accelerator item is an object or tool that can speed up a process or increase efficiency in a task. Synonyms for an accelerator item include catalyst, facilitator, enhancer, booster, and stimulant. These words refer to something that can accelerate or improve a specific outcome, often leading to measurable benefits in the long run. A catalyst promotes a chemical reaction, making it happen more quickly and efficiently. A facilitator helps to smooth out processes and make them easier to complete. An enhancer improves the quality or effectiveness of something. A booster increases the amount or intensity of something. Finally, a stimulant gets things moving by increasing activity or excitement. Using any of these synonyms, one might refer to an accelerator item as something that helps to speed up or enhance performance.