Yes, CRAMPOONS is a Scrabble word!

Letter values in Scrabble US: C 3, R 1, A 1, M 3, P 3, O 1, O 1, N 1, S 1.

Is it a valid word?

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

a hinged pair of curved iron bars; used to raise heavy objects
an iron spike attached to the shoe to prevent slipping on ice when walking or climbing

Also: climbing iron.