Is “Tumulus” a Scrabble word?
Yes
TUMULUS
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 Tumulus
/ˈtjuːmjələs/
noun
1.A mound of earth, especially one placed over a prehistoric tomb; a barrow.
Synonyms: burial mound, burian