polyvalency vs multivalence

polyvalency and multivalence both are nouns.

Word	Noun	Adjective	Verb	Adverb
polyvalency	Yes	No	No	No
multivalence	Yes	No	No	No

As nouns, polyvalency and multivalence are synonyms defined as:

polyvalency and multivalence: (chemistry) the state of having a valence greater than two

Other synonyms of polyvalency include multivalency, polyvalence.

polyvalency (noun)	multivalence (noun)
(chemistry) the state of having a valence greater than two	(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