Is “Overextension” a Scrabble word?
Yes
OVEREXTENSION
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 Overextension
noun
1.The state or quality of being overextended; extension beyond normal, correct, or appropriate bounds or limits.
2.Application of a term to too many referents, as for example when a child uses cat to refer to all animals.