man-made lake vs lake

man-made lake and lake both are nouns.

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

As nouns, lake is a hypernym of man-made lake; that is, lake is a word with a broader meaning than man-made lake:

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
lake: a body of (usually fresh) water surrounded by land

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