Clappers and Perceiver

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.

Perceiver and clappers are semantically related. in person who watches event topic. In some cases you can use "Perceiver" instead a noun "Clappers".

Perceiver noun - A person who becomes aware (of things or events) through the senses.

Clappers and perceiver are semantically related. Sometimes you can replace term "Clappers" with "Perceiver", this nouns are similar.