Clappers and Viewers

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.

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

Viewers noun - The audience reached by television.

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