1. Instantaneous
2. Transient
3. Fleeting
4. Brief
5. Passing
6. Ephemeral
7. Intermittent
8. Short-lived
9. Flash
10. Abrupt
11. Momentaneous
12. Episodic
13. Interim
14. Quick
15. Transitory
16. Interval
17. Split-second
18. Snap
19. Sporadic
20. Transitional
21. Interchangeable
22. Abbreviated
23. Episodical
24. Fly-by-night
25. Intermittence
26. Spurt
27. Short-term
28. Intervening
29. Occasional
30. Interposing

Are you looking for synonyms for the word “momentary”? Do you need ideas for other words that mean the same thing as “momentary”? Look no further! Here is a list of the best 30 synonyms for “momentary” that you can use in your writing. From “instantaneous” and “transient” to “fleeting” and “brief”, this list has all the words you need to express the concept of something happening for a short period of time. Whether you are writing an essay, a story, or a blog post, these synonyms for “momentary” will help you get your point across in a creative and interesting way.