Someone or something that swoops, or moves quickly and suddenly downward.
Swooper can make people think of birds or fast things.
Examples:
The bird is a swooper.
The swooper came down from the sky.
I saw a swooper in the park.
The swooper swooped down and caught a fish.
The superhero is a swooper, flying down to save the day.
The swooper swooped down and grabbed the ball.