Is “Gribble” a Scrabble word?
Yes
GRIBBLE
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 Gribble
noun
1.Any of various wood-boring marine crustaceans of the genus Limnoria, especially Limnoria lignorum, which cause damage to underwater wooden structures.