Is “Kneejerk” a Scrabble word?
Yes
KNEEJERK
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 Kneejerk
noun
1.A sudden reflexive movement of the leg below the knee, as a reaction to a tap to the tendon just below the patella (kneecap).
Synonyms: kneejerk reflex, patellar reflex
adjective
1.Unthinking, not carefully considered, (nearly) automatic, spontaneous, easily predictable
“He gave a knee-jerk response.”