river vs Nile

river and Nile both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
Nile	Yes	No	No	No

river (noun)	Nile (noun)
a large natural stream of water (larger than a creek)	the world's longest river (4150 miles); flows northward through eastern Africa into the Mediterranean; the Nile River valley in Egypt was the site of the world's first great civilization