General Synonyms:
* Transient: This is a very close synonym, emphasizing the fleeting nature of something.
* Fleeting: Similar to transient, this word highlights the short duration of something.
* Short-lived: This emphasizes the brevity of something's existence.
* Passing: This suggests that something is quickly gone, like a passing moment.
* Temporary: This emphasizes that something is not permanent.
* Momentary: This indicates something that lasts only for a very brief period.
* Transitory: This suggests something that is constantly changing and never lasting long.
More Specific Synonyms:
* Fugacious: This suggests a tendency to disappear or escape quickly.
* Evanescent: This highlights the gradual fading away of something.
* Short-lasting: This emphasizes the limited time something lasts.
* Brief: This is a general word for something that is short in duration.
Antonyms:
* Eternal: Lasting forever
* Permanent: Lasting for a very long time
* Enduring: Lasting or continuing for a long time
The best synonym to use will depend on the context of your writing.