Bone up and Bones

Bone up verb - To use the mind to acquire knowledge.

Bones is a synonym for bone up. In some cases you can replace term "Bones" with "Bone up", this verbs are similar.

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.

Bone up is a synonym for bones. Sometimes you can use "Bone up" instead a verb "Bones".