raider

[rey-der] /ˈreɪ dər/
noun
1.
a person or thing that raids.
2.
a commando, ranger, or the like, specially trained to participate in military raids.
3.
a light, fast warship, aircraft, etc., used in such a raid.
4.
a person who seizes control of a company, as by secretly buying stock and gathering proxies.
5.
Informal. a person who works within an organization for the purpose of gathering evidence of wrongdoing.
Origin
1860-65; raid + -er1
Examples from the web for raider
  • The searchlight beams on the right had picked up an enemy raider.
  • raider fans who are worried about their team's new franchise quarterback can actually feel optimistic.
  • The raider commander himself led a patrol to survey the scene and carry out the demolition of military stores and installations.
Word Origin and History for raider
n.

1863, agent noun from raid (v.). A word from the American Civil War.