River

The river was the only body of water in the forest. (TV: The Doctor's Wife) There were several rivers on Earth.

Gallifrey also had at least one river, (PROSE: Lungbarrow) as did the Gamma Forests. (TV: A Good Man Goes to War)

River Song's name originated from a literal translation of the language of the Gamma Forest's interpretation of her original name, Melody Pond — they translated "pond" as "river," since there were no other bodies of water on the planet. (TV: A Good Man Goes to War)