Yes, LARYNGES is a Scrabble word!

Letter values in Scrabble US: L 1, A 1, R 1, Y 4, N 1, G 2, E 1, S 1.

Is it a valid word?

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

a cartilaginous structure at the top of the trachea; contains elastic vocal cords that are the source of the vocal tone in speech

Also: voice box.