Is “Tanka” a Scrabble word?
Yes
TANKA
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 Tanka
noun
1.A form of Japanese verse in five lines of 5, 7, 5, 7, and 7 morae.