Yes, ROMANISES is a Scrabble word!

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

Is it a valid word?

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

a member of a people with dark skin and hair who speak Romany and who traditionally live by seasonal work and fortunetelling; they are believed to have originated in northern India but now are living on all continents (but mostly in Europe, North Africa, and North America)

Not playable in Scrabble US: ROMANY, ROMMANY, ROMANI, ROMA, LATINISE.