ritual - the prescribed procedure for conducting religious ceremonies

Eucharist, Eucharistic liturgy, Holy Eucharist, Holy Sacrament, Liturgy, Lord's Supper, sacrament of the Eucharist - a Christian sacrament commemorating the Last Supper by consecrating bread and wine

intercommunion - participation in Holy Communion by members of more than one church (eg Catholic and Orthodox)

change of state - the act of changing something into something different in essential characteristics

chomping - the act of chewing noisily

gumming, mumbling - ineffectual chewing (as if without teeth)

rumination - (of ruminants) chewing (the cud); "ruminants have remarkable powers of rumination"

eating, feeding - the act of consuming food