Yes, SFORZANDO is a Scrabble word!

Letter values in Scrabble US: S 1, F 4, O 1, R 1, Z 10, A 1, N 1, D 2, O 1.

Is it a valid word?

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

an accented chord
(music) a notation written above a note and indicating that it is to be played with a strong initial attack