adsorption vs sorption

adsorption and sorption both are nouns.

Word	Noun	Adjective	Verb	Adverb
adsorption	Yes	No	No	No
sorption	Yes	No	No	No

As nouns, sorption is a hypernym of adsorption; that is, sorption is a word with a broader meaning than adsorption:

adsorption: the accumulation of molecules of a gas to form a thin film on the surface of a solid
sorption: the process in which one substance takes up or holds another (by either absorption or adsorption)

adsorption (noun)	sorption (noun)
the accumulation of molecules of a gas to form a thin film on the surface of a solid	the process in which one substance takes up or holds another (by either absorption or adsorption)