Arm and Appendage

Arm noun - A portable weapon from which a shot is discharged by gunpowder.

Appendage is a synonym for arm in upper limb topic. In some cases you can use "Appendage" instead a noun "Arm", when it comes to topics like thing, body.

Nearby Words: armlet, armband, armless

Appendage noun - Something that is not necessary in itself but adds to the convenience or performance of the main piece of equipment.

Arm is a synonym for appendage in thing topic. You can use "Arm" instead a noun "Appendage", if it concerns topics such as body, tail.

Nearby Words: append, appended, appending