Is “Hyperextension” a Scrabble word?
Yes
HYPEREXTENSION
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 Hyperextension
noun
1.The extension of a joint beyond its normal range; the condition of being hyperextended.
2.An exercise performed by lying on the stomach, ideally inclined upwards as on a Roman chair to reach a higher range of motion, and raising and lowering the upper torso.