Is “Overproof” a Scrabble word?
Yes
OVERPROOF
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 Overproof
/(ˌ)əʊvəˈpɹuːf/
noun
1.A spirit possessing a higher proportion of alcohol than proof spirit.
verb
1.To proof (allow dough containing yeast to rise) excessively.
adjective
1.Possessing a higher proportion of alcohol than proof spirit.
Synonyms: OP, above proof