chemical science vs saturate

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

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

chemical science (noun)	saturate (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)	saturate (verb)
	cause (a chemical compound, vapour, solution, magnetic material) to unite with the greatest possible amount of another substance
	infuse or fill completely