Is “Supermax” a Scrabble word?
Yes
SUPERMAX
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 Supermax
noun
1.A prison with the highest possible level of security.
adjective
1.Being, or pertaining to, such a prison.