lake vs man-made lake

lake and man-made lake both are nouns.

Word	Noun	Adjective	Verb	Adverb
lake	Yes	No	No	No
man-made lake	Yes	No	No	No

As nouns, man-made lake is a hyponym of lake; that is, man-made lake is a word with a more specific, narrower meaning than lake:

lake: a body of (usually fresh) water surrounded by land
man-made lake: lake used to store water for community use; a lake (natural or artificial) used to store water and used as a source of water

Other hyponyms of lake include artificial lake, reservoir, bayou, lagoon, laguna, lagune, loch, lough, oxbow lake, pond, pool, tarn.

lake (noun)	man-made lake (noun)
a body of (usually fresh) water surrounded by land	lake used to store water for community use; a lake (natural or artificial) used to store water and used as a source of water
any of numerous bright translucent organic pigments
a purplish red pigment prepared from lac or cochineal