Yes, EUPHUISMS is a Scrabble word!

Letter values in Scrabble US: E 1, U 1, P 3, H 4, U 1, I 1, S 1, M 3, S 1.

Is it a valid word?

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

any artificially elegant style of language
an elegant style of prose of the Elizabethan period; characterized by balance and antithesis and alliteration and extended similes with and allusions to nature and mythology