1. Instantly
2. Promptly
3. Quickly
4. Suddenly
5. Unexpectedly
6. Abrupt
7. Immediate
8. Swift
9. Sharp
10. Prompt
11. Hasty
12. Brisk
13. Rapid
14. Expeditious
15. Blitz
16. Breakneck
17. Breakaway
18. Decisively
19. Unanticipated
20. Unceremonious
21. Unheralded
22. Unpremeditated
23. Unforeseen
24. Unlooked-for
25. Unplanned
26. Unwitting
27. Fleet
28. Accelerated
29. Hastened
30. Precipitate

When you are looking for the best ideas to describe something that happened quickly or unexpectedly, the best words to use are ‘synonyms for abruptly’. There are many different words that can be used to describe an abrupt action, such as instantly, promptly, quickly, suddenly, and unexpectedly. Other words for abruptly include abrupt, immediate, swift, sharp, prompt, and hasty. Brisk, rapid, expeditious, blitz, breakneck, and breakaway are also great words to use when describing an abrupt event. Decisively, unanticipated, unceremonious, unheralded, unpremeditated, unforeseen, unlooked-for, unplanned, and unwitting are all excellent synonyms for abruptly. Finally, fleet, accelerated, hastened, and precipitate are all great words to use when referring to an abrupt action. With so many words to choose from, it is easy to find the perfect synonym for abruptly.