Is “Firebrick” a Scrabble word?
Yes
FIREBRICK
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 Firebrick
noun
1.A brick capable of withstanding high temperatures without deforming.