Yes, LIQUIDATION is a Scrabble word!

Letter values in Scrabble US: L 1, I 1, Q 10, U 1, I 1, D 2, A 1, T 1, I 1, O 1, N 1.

Is it a valid word?

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

termination of a business operation by using its assets to discharge its liabilities
the act of exterminating
the murder of a competitor