Speedster
Definition 1 of 2

Context
The term is often used in sporting contexts.

The young speedster broke several records last season.
Positive Connotation
It generally carries a positive implication of skill and talent.

She is a speedster in the world of athletics.
Pop Culture
Often used in comics and movies to describe superheroes with super speed.

Flash is the most famous speedster in superhero comics.
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racersprinterfastballjetquick
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