Is “Caldera” a Scrabble word?
Yes
CALDERA
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 Caldera
noun
1.A large crater formed by collapse of the cone or edifice of a volcano.