lake vs body of water

lake and body of water both are nouns.

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

As nouns, body of water is a hypernym of lake; that is, body of water is a word with a broader meaning than lake:

lake: a body of (usually fresh) water surrounded by land
body of water: the part of the earth's surface covered with water (such as a river or lake or ocean)

Other hypernyms of lake include water.

lake (noun)	body of water (noun)
a body of (usually fresh) water surrounded by land	the part of the earth's surface covered with water (such as a river or lake or ocean)
any of numerous bright translucent organic pigments
a purplish red pigment prepared from lac or cochineal