General Non-Permanence:
* Temporary: This is the most common and straightforward word for something that is not permanent.
* Transient: This word emphasizes a brief or fleeting quality.
* Ephemeral: This word suggests something that is short-lived and delicate.
* Fleeting: Similar to transient, this word implies something that passes quickly.
Other Possibilities:
* Intermittent: This word refers to something that happens or exists in irregular intervals.
* Occasional: This word suggests something that happens only now and then.
* Provisional: This word implies something that is temporary and subject to change.
* Transitory: This word is similar to transient and fleeting, emphasizing the passing nature of something.
The best word to use depends on the specific context and the nuance you want to convey.