loch vs lake

loch and lake both are nouns.

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

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

loch (noun)	lake (noun)
Scottish word for a lake	a body of (usually fresh) water surrounded by land
a long narrow inlet of the sea in Scotland (especially when it is nearly landlocked)	any of numerous bright translucent organic pigments
	a purplish red pigment prepared from lac or cochineal