Is “Grubble” a Scrabble word?
Yes
GRUBBLE
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 Grubble
No definition found. This may be a proper noun, abbreviation, or uncommon word.