Is “Proviso” a Scrabble word?
Yes
PROVISO
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 Proviso
/pɹəˈvaɪzoʊ/
noun
1.A conditional provision to an agreement.