Is “Gumma” a Scrabble word?
Yes
GUMMA
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 Gumma
noun
1.A soft, non-cancerous growth, a form of granuloma, resulting from the tertiary stage of syphilis.