polyvalence vs polyvalent

polyvalence is a noun but polyvalent is not a noun.

Word	Noun	Adjective	Verb	Adverb
polyvalence	Yes	No	No	No
polyvalent	No	Yes	No	No

polyvalence (noun)	polyvalent (noun)
(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

polyvalence (adjective)	polyvalent (adjective)
	having more than one valence, or having a valence of 3 or higher
	containing several antibodies each capable of counteracting a specific antigen