Source : Webster's Revised Unabridged Dictionary (1913)

Compeer \Com*peer"\, [OE. comper, through French fr. L. compar;
   com- + par equal. See {Peer} an equal, and cf. 1st
   {Compare}.]
   An equal, as in rank, age, prowess, etc.; a companion; a
   comrade; a mate.

         And him thus answer'd soon his bold compeer. --Milton.

         His compeer in arms.                     --Ford.

Compeer \Com*peer"\, v. t.
   To be equal with; to match. [R.]

         In my rights, By me invested, he compeers the best.
                                                  --Shak.

Compeer \Com*peer"\, Compeir \Com*peir"\, v. i.
   See {Compear}.

Source : WordNet®

compeer
     n : a person who is of equal standing with another in a group
         [syn: {peer}, {equal}, {match}]