Is “Primacy” a Scrabble word?
Yes
PRIMACY
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 Primacy
/ˈpɹaɪ.mə.si/
noun
1.The state or condition of being prime or first, as in time, place, rank, etc.
“December 25 2016, Amruta Patil writing in The Hindu, The book in my hand”
2.Excellence; supremacy.
3.The office, rank, or character of a primate, it being the chief ecclesiastical station or dignity in a national church