Groot River in South Africa
The River Nile has only four letters.
River Trent.
Tagus
There doesn't seem to be one. It seems to be discussing a body of water, but nothing seems to fit. Brook (5 letters) Creek (5 letters) River (5 letters) Stream (6 letters) "A stream" is 7 letters, but that is 2 words and has a space.
zebra
The Amazon is not an African river (it's a South American river).
eland
okapi
African River was created in 1989-06.
The Nile river is the longest african river and it is 4,184 miles long
African River Martin was created in 1861.
The Major African River Is Zambezi