This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A cup or goblet.

n. A cup for the consecrated wine of the Eucharist.

n. A large drinking cup, often having a stem and base and used especially for formal occasions and religious ceremonies.

n. A cup or bowl; especially, the cup used in the sacrament of the Lord's Supper.

n. A drinking-cup or -bowl.

n. The cup in which the wine is administered in the celebration of the eucharist or Lord's supper.

n. The wine mingled with a little water for use at the eucharist.

n. The custom or rite of adding water to the eucharistic wine. See krasis.

n. A cup-shaped globe for diffusing light.

n. a bowl-shaped drinking vessel; especially the Eucharistic cup

"Good points bought up in other comments but I enjoyed this anyway … since I have no idea how heavy gold can be; to me a chalice is a goblet and close enough to a mug to get the idea across; and know nothing about diaphragms, other than they prevent pregnancy."

cup   

mixed chalice   

sangraal    grail    Holy Grail   

Cu    goblet   

Alice    Corvallis    allis    malice   

goblet    flagon    decanter    candelabra    crucifix    circlet    salver    beaker    ewer    candlestick