Yes, VICUNAS is a Scrabble word!

Letter values in Scrabble US: V 4, I 1, C 3, U 1, N 1, A 1, S 1.

Is it a valid word?

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

the wool of the vicuna
a soft wool fabric made from the fleece of the vicuna
small wild cud-chewing Andean animal similar to the guanaco but smaller; valued for its fleecy undercoat

Also: vicugna vicugna.