Yes, HENRIES is a Scrabble word!

Letter values in Scrabble US: H 4, E 1, N 1, R 1, I 1, E 1, S 1.

Is it a valid word?

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

a unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second
English chemist who studied the quantities of gas absorbed by water at different temperatures and under different pressures (1775-1836)
a leader of the American Revolution and a famous orator who spoke out against British rule of the American colonies (1736-1799)
United States physicist who studied electromagnetic phenomena (1791-1878)

Also: h, william henry, patrick henry, joseph henry.