Is “Mingler” a Scrabble word?
Yes
MINGLER
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 Mingler
/ˈmɪŋɡlə(ɹ)/
noun
1.One who, or that which, mingles.