|
Definition of Niobrara river
1. Noun. A tributary of the Missouri River.
Exact synonyms: Niobrara
Group relationships: America, The States, U.s., U.s.a., United States, United States Of America, Us, Usa
Generic synonyms: River
Group relationships: America, The States, U.s., U.s.a., United States, United States Of America, Us, Usa
Generic synonyms: River