Sinus Successus (Moon)

"Bay of Success"

The lunar feature Sinus Successus lies along the eastern edge of Mare Fecunditatis. Along the eastern edge of the bay is the flooded crater Condon, and the crater Webb forms the southern end of the area. There are no other features of significance on the bay. (wikipedia entry)

A sinus is a small plain. On the Moon they are named after latin terms describing weather and other abstract concepts.