Yes, COHERE is a Scrabble word!

Letter values in Scrabble US: C 3, O 1, H 4, E 1, R 1, E 1.

Is it a valid word?

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

come or be in close contact with; stick or hold together and resist separation
cause to form a united, orderly, and aesthetically consistent whole
have internal elements or parts logically connected so that aesthetic consistency results