Yes, LITURGIES is a Scrabble word!

Letter values in Scrabble US: L 1, I 1, T 1, U 1, R 1, G 2, I 1, E 1, S 1.

Is it a valid word?

LITURGIES is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a Christian sacrament commemorating the Last Supper by consecrating bread and wine
a rite or body of rites prescribed for public worship

Also: holy eucharist, sacrament of the eucharist, holy sacrament, eucharistic liturgy, lord's supper.

Not playable in Scrabble US: EUCHARIST.