Yes, CHILIS is a Scrabble word!

Letter values in Scrabble US: C 3, H 4, I 1, L 1, I 1, S 1.

Is it a valid word?

CHILIS is a valid word in the official Scrabble dictionary (US) and the UK Scrabble Dictionary, but not in Words with Friends (ENABLE).

ground beef and chili peppers or chili powder often with tomatoes and kidney beans
very hot and finely tapering pepper of special pungency

Also: chili con carne, chili pepper.