adsorber vs apparatus

adsorber and apparatus both are nouns.

Word	Noun	Adjective	Verb	Adverb
adsorber	Yes	No	No	No
apparatus	Yes	No	No	No

As nouns, apparatus is a hypernym of adsorber; that is, apparatus is a word with a broader meaning than adsorber:

adsorber: an apparatus used in the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to a surface.
apparatus: equipment designed to serve a specific function

Other hypernyms of adsorber include setup.

adsorber (noun)	apparatus (noun)
an apparatus used in the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to a surface.	equipment designed to serve a specific function
	(anatomy) a group of body parts that work together to perform a given function