raider

[ rey-der ]
/ ˈreɪ dər /

noun

a person or thing that raids.
a commando, ranger, or the like, specially trained to participate in military raids.
a light, fast warship, aircraft, etc., used in such a raid.
a person who seizes control of a company, as by secretly buying stock and gathering proxies.
Informal. a person who works within an organization for the purpose of gathering evidence of wrongdoing.

Origin of raider

First recorded in 1860–65; raid + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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