Beasts of burden, also known as draft animals, refer to domesticated animals that are used for carrying heavy loads, plowing fields or performing laborious tasks. There are several synonyms for beasts of burden, including working animals, pack animals, draught animals, and burden bearers. Working animals are typically domesticated animals such as horses, mules, donkeys, or oxen, that are used for performing manual labor. Pack animals are also used similarly as beasts of burden and typically carry loads on their backs. Draught animals such as horses or oxen are used to pull heavy loads. Burden bearers are animals that carry heavy loads or objects, typically on their backs.