Is “Brainbox” a Scrabble word?
Yes
BRAINBOX
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 Brainbox
noun
1.A very intelligent person.
2.The head or skull (which encloses the brain).
Synonyms: brain bucket, brainpan, cranium, brainiac, egghead