Is “Blockbuster” a Scrabble word?
Yes
BLOCKBUSTER
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 Blockbuster
/ˈblɒkˌbʌstə(ɹ)/
noun
1.A high-explosive bomb used for the purposes of demolishing extensive areas, such as a city block.
2.Something, such as a film or book, that sustains exceptional and widespread popularity and achieves enormous sales, as opposed to a box office bomb.
3.Anything very large or powerful; a whopper.