etching vs aquatint

etching and aquatint both are nouns.

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

As nouns, aquatint is a hyponym of etching; that is, aquatint is a word with a more specific, narrower meaning than etching:

etching: making engraved or etched plates and printing designs from them
aquatint: a method of etching that imitates the broad washes of a water color

Other hyponyms of etching include steel engraving, plaster printing.

As nouns, aquatint is a hyponym of etching; that is, aquatint is a word with a more specific, narrower meaning than etching:

etching (noun)	aquatint (noun)
making engraved or etched plates and printing designs from them	a method of etching that imitates the broad washes of a water color
an etched plate made with the use of acid	an etching made by a process that makes it resemble a water color
an impression made from an etched plate

etching (verb)	aquatint (verb)
	etch in aquatint