RNA viruses are a group of viruses that have RNA as their genetic material. These viruses have a wide range of synonyms that are used interchangeably, including riboviruses, RNA-viruses, and ribonucleic acid viruses. RNA viruses are classified based on their genomic structure, replication strategy, and genome organization. Some of the most common RNA viruses include human immunodeficiency virus (HIV), influenza virus, measles virus, hepatitis C virus, and Ebola virus. RNA viruses have a high degree of genetic variability, which makes them difficult to treat with traditional antiviral drugs. Understanding the synonyms for RNA virus can help researchers and healthcare professionals to better identify and classify these infectious agents.