The term "arm part" can refer to various aspects of the arm including the bicep, tricep, forearm, wrist, hand, elbow, and shoulder. There are several synonyms that can be used to describe these different parts of the arm, including limb, appendage, upper extremity, upper limb, forelimb, humerus, radius, ulna, dorsal fin, and wing. These synonyms can be useful in describing different parts of the arm in a medical context or when discussing anatomy. It is important to use accurate and appropriate terminology when discussing the arm, as it can affect medical diagnosis and treatment.