Coextension is typically defined as the sharing of an attribute or property between two or more items. There are several synonyms that can be used to convey similar meanings to coextension. Some of these include similarity, parallelism, analogy, affinity, and likeness. Other related terms might include correlation, connection, association, or comparison. Essentially, all of these synonyms convey the sense that there is some kind of shared characteristic or feature between different entities, whether it be a similarity in form, function, purpose, or some other aspect. By utilizing these various synonyms and related words, one can convey the idea of coextension in a variety of different contexts and situations.