multivalent vs chemical science

multivalent is not a noun while chemical science is a noun.

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

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

multivalent (adjective)	chemical science (adjective)
used of the association of three or more homologous chromosomes during the first division of meiosis
having more than one valence, or having a valence of 3 or higher
having many values, meanings, or appeals