What is another word for fossa?
Pronunciation: [fˈɒsə] (IPA) 
Fossa refers to a shallow depression or hollow in the ground, rock, or bone. Synonyms for the word "fossa" include trough, ditch, trench, depression, hollow, indentation, pit, cavity, and concavity. A trough is a long, narrow depression in the ground, often used for feeding livestock. A ditch is a narrow trench or channel, often for drainage purposes. A depression is a sunken or lowered area. A hollow is a deep, low-lying area, often surrounded by higher land. An indentation is a small, shallow dented area. A pit is a deep hole or hollow in the ground. A cavity is a hollow space within a solid object. And, a concavity is a surface that curves inward.
