Is “Buildup” a Scrabble word?
Yes
BUILDUP
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 Buildup
noun
1.An accumulation; an increase; a gradual development.
“Snow buildup on roads makes for hazardous driving.”
2.The construction of a composite core to repair a damaged tooth.