extractant vs dissolvent

extractant and dissolvent both are nouns.

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

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

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

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

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