The subject of this article originates from non-canonical sources. To find out about what is considered "canon" see LOTR:Canon.
Morenor is a name for the extreme south of the mysterious "dark land", encompassing the wastes south of the dense forests further north. It also includes the yellow Mountains on the southeastern coast.
In the game Middle-earth Role Play by Iron Crown Enterprises, a Sindarin name for the Dark Land, Morenor (probably intended to mean "Dark Middle-earth"), was given, although it does not appear in any of Tolkien's writings. If the name existed in Sindarin at all the form would more likely be Morennor.