Is “Mumming” a Scrabble word?
Yes
MUMMING
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 Mumming
verb
1.To act in a pantomime or dumb show.
noun
1.A pantomime or dumb show.