Yes, PERSUASION is a Scrabble word!

Letter values in Scrabble US: P 3, E 1, R 1, S 1, U 1, A 1, S 1, I 1, O 1, N 1.

Is it a valid word?

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

the act of persuading (or attempting to persuade); communication intended to induce belief or action
a personal belief or judgment that is not founded on proof or certainty