Is “Sopranino” a Scrabble word?
Yes
SOPRANINO
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Sopranino
noun
1.A musical instrument, especially a saxophone or recorder, that is a pitch higher than the soprano instrument of its class