High-up and Superstar

High-up noun - An important or influential (and often overbearing) person.

Superstar and high-up are semantically related in important topic. In some cases you can use "Superstar" instead the phrase "High-up" as a noun or an adjective.

Superstar noun - A person who is widely known and usually much talked about.

High-up and superstar are semantically related in important topic. Sometimes you can use "High-up" instead the word "Superstar" as a noun or an adjective.