Buzzers and Clappers

Clappers and buzzers are semantically related. In some cases you can use "Clappers" instead a noun "Buzzers".

Clappers 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.

Buzzers and clappers are semantically related. Sometimes you can use "Buzzers" instead a noun "Clappers".