Arauca vs Arauca River

Arauca and Arauca River both are nouns.

Word	Noun	Adjective	Verb	Adverb
Arauca	Yes	No	No	No
Arauca River	Yes	No	No	No

As nouns, Arauca and Arauca River are synonyms defined as:

Arauca and Arauca River: a river that rises in northern Colombia and flows generally eastward to the Orinoco in central Venezuela

Arauca (noun)	Arauca River (noun)
a river that rises in northern Colombia and flows generally eastward to the Orinoco in central Venezuela	a river that rises in northern Colombia and flows generally eastward to the Orinoco in central Venezuela