Protector

n. one who protects others, defender; guard, keeper, preserver

Protector means a person or thing that protects, and may refer to: Protector (title), a title or part of various historical titles of heads of state and others in authority, especially:Lord Protector, two high positions in the history of the British political systemProtector may also refer to: In books and comics:Protector (novel), a 1973 science fiction novel by American writer Larry NivenPak Protector, a form of alien life in this and other novels by NivenProtector (comics), a superhero briefly a member of the New Teen TitansProtector (Marvel Comics), a character in the Marvel UniverseThe Protector (novel), a 2003 novel by David Morrell
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A remote weapon system or station, (RWS) is a remotely controlled weapon station for light and medium caliber weapons which can be installed on any type of vehicle or other platforms (land and sea-based). Such equipment is used on modern military vehicles, as it allows a gunner to remain in the relative protection of the vehicle. It may also be retrofitted onto existing vehicles, for example, the CROWS system is being fitted to American Humvees.
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Protector /pro·tec·tor/ a substance in a catalyst that prolongs the rate of activity in the latter. [more]Protector - Community and Resources

Noun
1. a person who cares for persons or property
(synonym) defender, guardian, shielder
(hypernym) preserver
(hyponym) chaperon, chaperone
(derivation) protect

adj. protective; patronizing

n. protector, guardian; defender; embankment