Viral gene is a term used to describe a set of genes that are present in a virus genome. These genes are responsible for viral replication, transcription, and packaging. However, there are several synonyms that can be used to describe viral genes. Some of these include virulence factors, pathogenicity genes, and viral coding sequences. These terms are often used to describe specific subsets of viral genes that are associated with certain characteristics of the virus, such as its ability to cause disease. The use of these different synonyms can help scientists better understand the functions and interactions of viral genes, and can aid in the development of antiviral therapies.