river vs Ottawa

river and Ottawa both are nouns.

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

river (noun)	Ottawa (noun)
a large natural stream of water (larger than a creek)	the capital of Canada (located in southeastern Ontario across the Ottawa river from Quebec)
	a river in southeastern Canada that flows along the boundary between Quebec and Ontario to the Saint Lawrence River near Montreal
	a member of the Algonquian people of southern Ontario