The term "biofact" refers to an object or artifact that has been made or altered by a living organism, such as a bird's nest or an ant hill. There are many synonyms for this term that can be used depending on the context in which it is being used. Some of these synonyms include biogenic substance, organic remains, biomaterial, biodebris, and biogenic object. Other related terms that may be used interchangeably with "biofact" include biostructure, biomorphic artifact, and biogenic trace. These terms all refer to objects or materials that have been created or transformed by living organisms and can provide valuable insights into the biology and behavior of these organisms.