Is “Clumpiest” a Scrabble word?
Yes
CLUMPIEST
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 Clumpiest
adjective
1.Forming or tending to form clumps.
2.Resembling a clump.
3.Clompy; with heavy footfalls.