Multivalency refers to the phenomenon where a molecule or ion can bond with multiple other molecules or ions at the same time. Synonyms for multivalency include polyvalency, high valency, and multivalence. These terms are commonly used in chemistry and biochemistry to describe the ability of certain elements and compounds to bind with multiple molecules or compounds. The concept of multivalency is important in understanding the interactions between molecules in biological systems, like the binding between antibodies and antigens in the immune system. The different synonyms for multivalency are used interchangeably depending on the context of the research or discussion.