The Collaborative International Dictionary of English v.0.48:

Curate \Cu"rate\ (k[=u]"r[asl]t), n. [LL. curatus, prop., one
   who is charged with the care (L. cura) of souls. See Cure,
   n., and cf. Cur['e]]
   One who has the cure of souls; originally, any clergyman, but
   now usually limited to one who assists a rector or vicar.
   --Hook.
   [1913 Webster]

         All this the good old man performed alone,
         He spared no pains, for curate he had none. --Dryden.
   [1913 Webster]

WordNet (r) 3.0 (2006):

curate
    n 1: a person authorized to conduct religious worship;
         "clergymen are usually called ministers in Protestant
         churches" [syn: curate, minister of religion,
         minister, parson, pastor, rector]

Moby Thesaurus II by Grady Ward, 1.0:

63 Moby Thesaurus words for "curate":
   DD, Doctor of Divinity, Grand Penitentiary, Holy Father, Holy Joe,
   abbe, abuna, antipope, archbishop, archdeacon, archpriest, bishop,
   bishop coadjutor, canon, cardinal, cardinal bishop,
   cardinal deacon, cardinal priest, chaplain, churchman, clergyman,
   cleric, clerical, clerk, coadjutor, cure, dean, diocesan, divine,
   ecclesiarch, ecclesiastic, exarch, hierarch, high priest,
   man of God, metropolitan, military chaplain, minister, padre, papa,
   parson, pastor, patriarch, penitentiary, pontiff, pope, prebendary,
   prelate, primate, rector, reverend, rural dean, servant of God,
   shepherd, sky pilot, subdean, suffragan, supply clergy,
   supply minister, the Reverend, the very Reverend, tonsured cleric,
   vicar



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

CURATE, eccl. law. One who represents the incumbent of a church, person,
or20 vicar, and takes care of the church, and performs divine service in his
stead.