Is “Supermini” a Scrabble word?
Yes
SUPERMINI
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 Supermini
noun
1.A small motor car, especially a hatchback, which is powerful for its size or class
2.A superminicomputer