Is “Grossly” a Scrabble word?
Yes
GROSSLY
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 Grossly
/ˈɡɹəʊsli/
adverb
1.In a gross manner; without delicacy.
2.Roughly; approximately; inexactly; sketchily.