river vs Weser

river and Weser both are nouns.

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

river (noun)	Weser (noun)
a large natural stream of water (larger than a creek)	a river in northwestern Germany that flows northward to the North Sea near Bremerhaven