What a synonym for fleeting?

Here are some synonyms for "fleeting," depending on the specific nuance you want to convey:

General synonyms:

* Transient

* Ephemeral

* Short-lived

* Momentary

* Passing

* Transitory

* Brief

* Temporary

More specific synonyms:

* Sudden: If you want to emphasize the unexpectedness of the event.

* Evanescent: If you want to emphasize the fading away of the event.

* Fugacious: If you want to emphasize the quickness of the event.

* Intermittent: If you want to emphasize that the event happens in bursts or intervals.

The best synonym for "fleeting" will depend on the context of your sentence.