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Superstar

//ˈsu.pɚˌstɑɹ// noun

Noun

1
Someone who has accumulated a vast amount of fame; a high-level celebrity.
2
someone who is dazzlingly skilled in any field wordnet
3
An exceptionally productive employee.
"Want to hire a coding superstar? Call the agent."
4
A giant star. rare
"The greater an object's mass, the greater its gravitational force. If a star could attain a certain mass --- say a million to 100 million times the mass of our own sun --- then its gravity would become 100 times as powerful as the forces generated by the strongest known nuclear reactions. Such a super superstar, in a normal course of its evolution, would contract."

From super- + star.

Unscramble this word: superstar