Is “Fossa” a Scrabble word?
Yes
FOSSA
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 Fossa
/ˈfɑsə/
noun
1.A pit, groove, cavity, or depression.
2.A long, narrow, shallow depression on the body of an extraterrestrial body, such as a planet or moon.