Learn That Word

Synonyms for River Kasai (same or very similar meaning)

WordNet sense 1 (a river of southwestern Africa that rises in central Angola and flows east and then north (forming part of the border between Angola and Congo) and continuing northwest through Congo to empty into the Congo River on the border between Congo and Republic of the Congo):
Kasai, Kasai River

From the ODE community, based on WordNetadd/edit