Tap-dancer and Tap dancer

Tap dancer and tap-dancer are semantically related In some cases you can replace phrase "Tap dancer" with "Tap-dancer", this phrases are similar.

Tap dancer noun - A dancer who sounds out rhythms by using metal taps on the toes and heels of the shoes.

Tap-dancer and tap dancer are semantically related in ballerina topic. You can use "Tap-dancer" instead a noun phrase "Tap dancer".