Is “Superstructure” a Scrabble word?
Yes
SUPERSTRUCTURE
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 Superstructure
noun
1.Any structure built above the top full deck (FM 55-501).
2.Any material structure or edifice built on something else; that which is raised on a foundation or basis.
3.(sometimes figurative) All that part of a building above the basement.