Paralogous is a term that is used in the field of molecular biology to describe the genes, proteins, or other molecules that have evolutionary relationships that are similar, but not identical. Some possible synonyms for this word might include: homologous, analogous, or related, all of which describe the concept of similarities and differences between related structures or molecules. Other possible synonyms might include orthologous, conserved, or even parallel, depending on the specific context in which the word is being used. Ultimately, the choice of synonym will depend on the nuances of the situation and the specific meaning that the writer or speaker is attempting to convey.