Bones and Bony structure

Bones noun - A percussion instrument consisting of a pair of hollow pieces of wood or bone (usually held between the thumb and fingers) that are made to click together (as by Spanish dancers) in rhythm with the dance.

Bony structure and bones are semantically related. In some cases you can use "Bony structure" instead a noun "Bones".

Bones and bony structure are semantically related. You can use "Bones" instead a noun phrase "Bony structure".