Is “Breakneck” a Scrabble word?
Yes
BREAKNECK
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 Breakneck
noun
1.A fall that breaks the neck.
2.A dangerous steep place from which one could fall.
adjective
1.Dangerously fast; hell-for-leather.
“He came running around the corner at a breakneck pace and couldn't stop in time to avoid hitting the fruit stand.”