Hermetically sealed is an often-used term that describes the state of being completely airtight. This term is typically associated with packaging, containers, and other objects that require airtight sealing. However, there are several synonyms for hermetically sealed that can be used to describe the same thing. These include tightly sealed, airless, impervious, leak-proof, impermeable, and vacuum-sealed. Each of these synonyms captures the essence of what it means to be hermetically sealed. While it may seem trivial, having a range of synonyms can enhance communication and help to avoid redundancy in language. Overall, using synonyms for hermetically sealed can broaden our vocabulary and convey ideas more effectively.