A rat trap is an essential tool for preventing rats from infiltrating your home or workplace. However, there are several synonyms for rat trap that accomplish the same goal of keeping rats at bay. One of the most common synonyms is mouse trap, which is suitable for catching both mice and rats. Another word for rat trap is vermin trap, which can be used to trap a variety of pests including rats, mice, and even insects. Some other synonyms include rodent catcher, pest control device, and critter trap. These various terms all describe a device designed to capture and dispose of unwanted vermin, keeping your space free from unwanted pests.