multivalency vs polyvalency

multivalency and polyvalency both are nouns.

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

As nouns, multivalency and polyvalency are synonyms defined as:

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

Other synonyms of multivalency include multivalence, polyvalence.

multivalency (noun)	polyvalency (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