Vicar :  (noun)
1: a Roman Catholic priest who acts for another higher-ranking clergyman
2: (Episcopal Church) a clergyman in charge of a chapel
3: (Church of England) a clergyman appointed to act as priest of a parish

Grand Penitentiary, Holy Father, abuna, advocate, agent, alter ego, alternate, alternative, amicus curiae, analogy, antipope, archbishop, archdeacon, archpriest, attorney, backup, backup man, bishop, bishop coadjutor, canon, cardinal, cardinal bishop, cardinal deacon, cardinal priest, champion, change, changeling, chaplain, coadjutor, comparison, copy, counterfeit, curate, dean, deputy, diocesan, double, dummy, ecclesiarch, equal, equivalent, ersatz, exarch, exchange, executive officer, exponent, fake, figurehead, fill-in, ghost, ghostwriter, hierarch, high priest, imitation, lieutenant, locum, locum tenens, makeshift, metaphor, metonymy, metropolitan, next best thing, papa, paranymph, patriarch, penitentiary, personnel, phony, pinch hitter, pleader, pontiff, pope, prebendary, prelate, primate, procurator, proxy, rector, relief, replacement, representative, reserves, ringer, rural dean, second in command, second string, secondary, sign, spares, stand-in, sub, subdean, substituent, substitute, substitution, succedaneum, suffragan, superseder, supplanter, surrogate, symbol, synecdoche, third string, token, understudy, utility man, utility player, vicar general, vice, vice-president, vice-regent, vicegerent,