Chaetal refers to the bristles or setae found on the body of certain animals, such as worms and arthropods. Synonyms for this word can include setaceous, setigerous, and setiparous. Other related terms include bristly, prickly, and spiny, which can also describe the texture of a surface or object. Additionally, hairs, quills, and spikes can be used to refer to similar physical features. These synonyms can be useful when describing the physical characteristics of an animal or when discussing the properties of a specific material or object.