One who speaks or writes in defense of a faith, a cause, or an institution.
One who makes an apology.
A person engaged in a crusade.
An American, especially a soldier or leader who wages war against Islamist militants.
the crusaders of the Middle Ages
A Westerner; a Christian, especially of European descent or a missionary.
A fighter in the medieval Crusades who had taken the Cross.
(either attributively or in the plural) The United States and its Western allies.