Yes, JUNIPER is a Scrabble word!

Letter values in Scrabble US: J 8, U 1, N 1, I 1, P 3, E 1, R 1.

Is it a valid word?

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

desert shrub of Syria and Arabia having small white flowers; constitutes the juniper of the Old Testament; sometimes placed in genus Genista
coniferous shrub or small tree with berrylike cones

Also: juniper bush, retama raetam, genista raetam.

Not playable in Scrabble US: RAETAM.