River

A river was a body of moving water. There were several rivers on Earth. (TV: Doctor Who, Aliens of London / World War Three, WC: Shada and others) A smaller river was sometimes known as a stream. (PROSE: Sick Building)

On Earth
The Mississippi was the longest river in North America. (COMIC: )

Extraterrestrial rivers
Gallifrey also had at least one river, (PROSE: Lungbarrow, PROSE: Blind Fury) as did the Gamma Forests. (TV: A Good Man Goes to War) Yaddlefish lived in Gallifreyan rivers. (PROSE: Blind Fury)

River Song's name originated from a literal translation of her original name, Melody Pond, into the language of the Gamma Forests. They translated "pond" as "river," since the only water in the forest was the river. (TV: The Doctor's Wife, A Good Man Goes to War)

Kromon had rivers in "angry flood", which "the company" diverted to exploit resources on the planet. (AUDIO: The Creed of the Kromon)

When the Thals of Skaro emigrated to the continent of Davius, they settled near the River of Whirling Waters. (PROSE: The Secret Lives of Monsters)

Out of normal universe
On the E-Space planet Alzarius, Alzarians used to settle near a river before their departure from the world. Riverfruits grew onshore. It was the original habitat of the Marshmen. (TV: Full Circle)