How many points is THIRTY worth in Scrabble?

THIRTY is worth 12 points in Scrabble.

Is THIRTY a valid Scrabble word? Yes — 12 points

Yes, THIRTY is a valid Scrabble word worth 12 points.

Yes, THIRTY is a valid Words With Friends word worth 10 points.

THIRTY is a valid Scrabble US/CAN word worth 12 points:

T₁H₄I₁R₁T₁Y₄

THIRTY is valid in Scrabble UK (World) —

T₁H₄I₁R₁T₁Y₄

THIRTY is a valid Words With Friends word worth 10 points:

T₁H₃I₁R₁T₁Y₃

You can make 13 words from thirty according to the Scrabble US and Canada dictionary.