Is “Thickly” a Scrabble word?
Yes
THICKLY
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 Thickly
/ˈθɪkli/
adverb
1.In a thick manner.