artificial lake vs lake

artificial lake and lake both are nouns.

Word	Noun	Adjective	Verb	Adverb
artificial lake	Yes	No	No	No
lake	Yes	No	No	No

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

artificial 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

artificial 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