chemical science vs polyvalency

chemical science and polyvalency both are nouns.

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

chemical science (noun)	polyvalency (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	(chemistry) the state of having a valence greater than two
	(toxicology) the state of being capable of counteracting more than one toxin or antigen or kind of microorganism