a, o, b, e, n, r, i, v are letters that make 'Niobrara River'
ER, OB, BR, ar, rive, RI, river, Ara, iv, IV, bra, RA, AR, Io, Niobrara, Ob, Ra, Ar, Br, Er, Ni are words within 'Niobrara River'
1 possible definitions for 'Niobrara River'
Under this definition, niobrara river is a noun and has the following properties:
Niobrara has the same meaning as Niobrara River
'Niobrara River' can be considered an instance of river.
'Niobrara River' can be a part of United States, U.S., America, the States, US, U.S.A., United States of America, USA.