Protector
Part of speech: noun
Definition: Someone who protects or guards, by assignment or on his own initiative. A device or mechanism which is designed to protect. One who prevents interference. A state or other subject under international law, exercising a protectorate over another subject in international law.
Example sentence: This and no other is the root from which a tyrant springs; when he first appears he is a protector.
Defender
Part of speech: noun
Definition: Someone who defends people or property.A lawyer who represents defendants.A fighter who repels an attack.One of the players whose primary task is to prevent the opposition from scoring.
Example sentence: I believe the most important thing for the defender is to take the ball away from the opposing team, no matter what, and not to allow any space or give any occasions for opponents to score goals.