Axenization is a term that's not commonly used in everyday language. However, there are some synonyms for this term that can be used interchangeably to describe the same thing. Some of the synonyms for axenization are germ-free, sterile, aseptic, and axenic. Germ-free and sterile are commonly used in medical industries to describe environments that are completely devoid of bacteria and other harmful microorganisms. Aseptic is another term that's used to describe something that's completely free of contaminants. Finally, axenic is a more technical term used to describe conditions that are completely devoid of any living cells, including bacteria and viruses.