chemical science vs adsorb

chemical science is a noun but adsorb is not a noun.

Word	Noun	Adjective	Verb	Adverb
chemical science	Yes	No	No	No
adsorb	No	No	Yes	No

chemical science (noun)	adsorb (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions

chemical science (verb)	adsorb (verb)
	accumulate (liquids or gases) on the surface