Yes, WORLDLIER is a Scrabble word!

Letter values in Scrabble US: W 4, O 1, R 1, L 1, D 2, L 1, I 1, E 1, R 1.

Is it a valid word?

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

characteristic of or devoted to the temporal world as opposed to the spiritual world
very sophisticated especially because of surfeit; versed in the ways of the world