multivalent vs multi-valued

multivalent and multi-valued both are adjectives.

Word	Noun	Adjective	Verb	Adverb
multivalent	No	Yes	No	No
multi-valued	No	Yes	No	No

As adjectives, multivalent and multi-valued are synonyms defined as:

multivalent (adjective)	multi-valued (adjective)
used of the association of three or more homologous chromosomes during the first division of meiosis	having many values, meanings, or appeals
having more than one valence, or having a valence of 3 or higher
having many values, meanings, or appeals