Polynuclear is a term typically used to describe a chemical compound containing two or more nuclei. However, there are several alternative synonyms for the word which can be used interchangeably depending on context. These include "multinuclear," which refers to the presence of multiple nuclei within a structure, and "polycentric," which describes a structure with multiple centers. "Polycyclic" is another term used to describe a compound with multiple interconnected rings, and "multipolar" is frequently used in reference to molecular structures with multiple polar bonds. Additionally, "multivalent" and "polyvalent" both denote a compound with multiple valences or chemical bonds with other atoms.