Supplication

Noun

 * 1) An act of supplicating; a humble request.
 * 2) Specifically, a prayer or entreaty to a god.

Adjectives for Supplication
formal; strong; affecting; frantic; fervent; piteous; reverent; honest.

Thesaurus
Angelus, Ave, Ave Maria, Hail Mary, Kyrie Eleison, Paternoster, adjuration, aid prayer, appeal, application, beadroll, beads, begging, beseeching, beseechment, bid, bidding prayer, breviary, call, chaplet, clamor, collect, communion, contemplation, cry, devotions, entreating, entreaty, grace, impetration, imploration, imploring, imprecation, intercession, invocation, invocatory plea, litany, meditation, obsecration, obtestation, orison, petition, plea, pleading, prayer, prayer wheel, rogation, rosary, silent prayer, solicitation, soliciting, suit, supplicating, thanks, thanksgiving

Etymology
From Old French supplication, from Latin supplicatio, from supplicare ‘to supplicate’.