river vs body of water

river and body of water both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
body of water	Yes	No	No	No

river (noun)	body of water (noun)
a large natural stream of water (larger than a creek)	the part of the earth's surface covered with water (such as a river or lake or ocean)