Weser vs river

Weser and river both are nouns.

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

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