extractant vs dissolver

extractant and dissolver both are nouns.

Word	Noun	Adjective	Verb	Adverb
extractant	Yes	No	No	No
dissolver	Yes	No	No	No

As nouns, dissolver is a hypernym of extractant; that is, dissolver is a word with a broader meaning than extractant:

extractant: an immiscible liquid used to extract a substance from another liquid.
dissolver: a liquid substance capable of dissolving other substances

Other hypernyms of extractant include dissolvent, dissolving agent, resolvent, solvent.

extractant (noun)	dissolver (noun)
an immiscible liquid used to extract a substance from another liquid.	a liquid substance capable of dissolving other substances