sorption vs soaking up

sorption and soaking up both are nouns.

Word	Noun	Adjective	Verb	Adverb
sorption	Yes	No	No	No
soaking up	Yes	No	No	No

As nouns, soaking up is a hyponym of sorption; that is, soaking up is a word with a more specific, narrower meaning than sorption:

sorption: the process in which one substance takes up or holds another (by either absorption or adsorption)
soaking up: (chemistry) a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid

Other hyponyms of sorption include absorption, adsorption, surface assimilation.

sorption (noun)	soaking up (noun)
the process in which one substance takes up or holds another (by either absorption or adsorption)	(chemistry) a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid