Relatum is a term used in philosophy and science to refer to the object or entity that is being compared, related, or measured with another object or entity. In other words, it is the counterpart that is being referred to in a relation. Some synonyms for relatum include subject, object, entity, datum, component, element, factor, and variable. These terms are often used in specific contexts to indicate the different relations that exist between objects or entities. For instance, the term 'variable' is used in statistical analysis, while 'datum' is used in scientific research. Other related terms include attribute, characteristic, parameter, and property, which are used to describe the features or qualities of the relatum.