withstander

Etymology
From, equivalent to.

Noun

 * 1) A person who withstands or resists; an opponent.
 * 2) * 1650,, “A Discourse of the Original and Fundamental Cause of Natural, Customary, Arbitrary, Voluntary and Necessary War”, in The Works of Sir Walter Ralegh, Kt., volume VIII (Miscellaneous Works), Oxford, Oxfordshire: , 1829, page 253:
 * The ordinary theme and argument of history is war; which may be defined the exercise of violence under sovereign command against withstanders; force, authority, and resistance, being the essential parts thereof.