Yes, PEARS is a Scrabble word!

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

Is it a valid word?

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

sweet juicy gritty-textured fruit available in many varieties
Old World tree having sweet gritty-textured juicy fruit; widely cultivated in many varieties

Also: pear tree, pyrus communis.