Biowarfare refers to the use of biological agents, such as viruses, bacteria or toxins, as weapons in warfare. The term can also be called germ warfare. Synonyms for biowarfare include: 1. Biological warfare 2. Bioterrorism 3. Bioattack 4. Germ warfare 5. Biological terrorism 6. Biologically-based warfare 7. Biocombat 8. Bioweaponry 9. Biological weapons program 10. Biodefense These terms all refer to the same act of using biological agents as weapons in warfare, often with the intention of causing mass harm or destruction. It is an illegal and unethical practice that has been banned by international treaties, including the Biological Weapons Convention of 1972.