The crossword solution for the term HOME PEST is ANT, which is a three-letter word. Ants are one of the most common household pests, and they can be found in many different parts of the world. They are small insects that live in colonies and feed on a variety of food sources, including sugar, proteins, and fats. Ants can cause damage to structures and furniture, as well as contaminate food sources. They can also spread disease and cause allergic reactions in some people.