Is “Superhighway” a Scrabble word?
Yes
SUPERHIGHWAY
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 Superhighway
noun
1.An expressway, especially one designed for high speeds.
2.(by extension) A major route that carries most of the traffic going in a given direction by a specified mode of transportation.
3.(metaphoric) The primary mechanism used in the movement of electronic data or information; information superhighway.