Yes, SCHNAUZER is a Scrabble word!

Letter values in Scrabble US: S 1, C 3, H 4, N 1, A 1, U 1, Z 10, E 1, R 1.

Is it a valid word?

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

old German breed of sturdy black or greyish wire-haired terriers having a blunt muzzle ranging in size from fairly small to very large; used as ratters and guard dogs or police dogs