Yes, TOLERATING is a Scrabble word!

Letter values in Scrabble US: T 1, O 1, L 1, E 1, R 1, A 1, T 1, I 1, N 1, G 2.

Is it a valid word?

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

put up with something or somebody unpleasant
recognize and respect (rights and beliefs of others)
have a tolerance for a poison or strong drug or pathogen or environmental condition
allow the presence of or allow (an activity) without opposing or prohibiting

Also: stick out, put up.