coadjutor

from WordNet (r) 3.0 (2006)

coadjutor
    n 1: an assistant to a bishop

from The Collaborative International Dictionary of English v.0.48

Coadjutor \Co`ad*ju"tor\, n. [L. See {Co}-, and {Aid}.]
   1. One who aids another; an assistant; a coworker.
      [1913 Webster]

            Craftily outwitting her perjured coadjutor.
                                                  --Sheridan.
      [1913 Webster]

   2. (R. C. Ch.) The assistant of a bishop or of a priest
      holding a benefice.
      [1913 Webster]

from Bouvier's Law Dictionary, Revised 6th Ed (1856)

COADJUTOR, eccl. law. A fellow helper or assistant; particularly applied to 
the assistant of a bishop.

from Moby Thesaurus II by Grady Ward, 1.0

83 Moby Thesaurus words for "coadjutor":
      Grand Penitentiary, Holy Father, abuna, acolyte, adjunct, adjutant,
      agent, aid, aide, aide-de-camp, aider, ally, antipope, archbishop,
      archdeacon, archpriest, assistant, associate, attendant, auxiliary,
      bedfellow, best man, bishop, bishop coadjutor, brother,
      brother-in-arms, canon, cardinal, cardinal bishop, cardinal deacon,
      cardinal priest, chaplain, coadjutant, coadjutress, coadjutrix,
      cohort, colleague, companion, compatriot, compeer, comrade,
      confederate, confrere, consociate, consort, crony, curate, dean,
      deputy, diocesan, ecclesiarch, exarch, executive officer, fellow,
      fellow member, help, helper, helpmate, helpmeet, hierarch,
      high priest, lieutenant, metropolitan, papa, paranymph,
      paraprofessional, patriarch, penitentiary, pontiff, pope,
      prebendary, prelate, primate, rector, rural dean, second, servant,
      sideman, subdean, suffragan, supporting actor,
      supporting instrumentalist, vicar