Is “Libretto” a Scrabble word?
Yes
LIBRETTO
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 Libretto
/lɪˈbɹɛt.əʊ/
noun
1.The text of a dramatic musical work, such as an opera.
2.A book containing such a text.