Is “Quincentenary” a Scrabble word?
Yes
QUINCENTENARY
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 Quincentenary
noun
1.A five-hundredth anniversary.
adjective
1.Pertaining to a quincentenary; quincentennial.