Is “Tussock” a Scrabble word?
Yes
TUSSOCK
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 Tussock
/ˈtʌs.ək/
noun
1.A tuft or clump of green grass or similar verdure, forming a small hillock.