The term 'Paper Nest Builder' refers to two species of wasps, the WASP (4 letters) and the HORNET (6 letters). These wasps are known for their ability to build nests out of paper-like material. They use chewed wood and plant fibers to construct their nests, which are usually found in sheltered areas such as hollow trees or under eaves. The nests are used to protect their young and provide a safe place for them to grow and develop. Wasps and hornets are important pollinators and predators of other insects, helping to keep the environment in balance.