Yes, TRIPLICITY is a Scrabble word!

Letter values in Scrabble US: T 1, R 1, I 1, P 3, L 1, I 1, C 3, I 1, T 1, Y 4.

Is it a valid word?

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

(astrology) one of four groups of the zodiac where each group consists of three signs separated from each other by 120 degrees
the property of being triple