Nouns

(n)prayer, supplicationthe act of communicating with a deity (especially as a petition or in adoration or contrition or thanksgiving)“the priest sank to his knees in prayer”
(n)prayer, petition, orisonreverent petition to a deity
(n)entreaty, prayer, appealearnest or urgent request“an entreaty to stop the fighting”, “an appeal for help”, “an appeal to the public to keep calm”
(n)prayera fixed text used in praying
(n)prayer, supplicantsomeone who prays to God