Yes, LOOPERS is a Scrabble word!

Letter values in Scrabble US: L 1, O 1, O 1, P 3, E 1, R 1, S 1.

Is it a valid word?

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

small hairless caterpillar having legs on only its front and rear segments; mostly larvae of moths of the family Geometridae

Also: measuring worm.