Is “Quadrennial” a Scrabble word?
Yes
QUADRENNIAL
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 Quadrennial
/ˌkwɒˈdɹɛn.i.əl/
noun
1.A four-year period, a quadrennium.
adjective
1.Happening every four years.
2.Lasting for four years.