Isomorphic
Part of speech: adjective
Definition: having a similar structure to something that is not related genetically related by an isomorphism
Similarity
Part of speech: noun
Definition: Closeness of appearance to something else.The relation of sharing properties.
Example sentence: To challenge the dominance of identity politics, we need to champion an alternative universalist approach. This wouldn't mean bland similarity, with everybody talking and looking the same. Instead, it would help us challenge the imposition of formal, ethnic categories and allow us to develop richer differences based on character and interests.