Is “Circumvallating” a Scrabble word?
Yes
CIRCUMVALLATING
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 Circumvallating
verb
1.To surround with, or as if with, a rampart.