aquatint vs etch

aquatint is a noun but etch is not a noun.

Word	Noun	Adjective	Verb	Adverb
aquatint	Yes	No	Yes	No
etch	No	No	Yes	No

As verbs, etch is a hypernym of aquatint; that is, etch is a word with a broader meaning than aquatint:

aquatint (noun)	etch (noun)
a method of etching that imitates the broad washes of a water color
an etching made by a process that makes it resemble a water color

aquatint (verb)	etch (verb)
etch in aquatint	selectively dissolve the surface of (a semiconductor or printed circuit) with a solvent, laser, or stream of electrons
	carve or cut a design or letters into
	make an etching of
	carve or cut into a block used for printing or print from such a block
	cause to stand out or be clearly defined or visible