polyvalency vs chemical science

polyvalency and chemical science both are nouns.

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

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