Yes, ROMANS is a Scrabble word!

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

Is it a valid word?

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

a New Testament book containing an exposition of the doctrines of Saint Paul; written in AD 58
a resident of modern Rome
an inhabitant of the ancient Roman Empire
a typeface used in ancient Roman inscriptions

Also: epistle of paul the apostle to the romans, epistle to the romans, roman type, roman letters, roman print.