Is “Diarchy” a Scrabble word?
Yes
DIARCHY
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 Diarchy
noun
1.Rule by two people.
2.A state under the rule of two people.
“Swaziland is an absolute diarchy, ruled jointly by a king and a queen mother.”