1. Liable
2. Disposed
3. Susceptible
4. Inclined
5. Vulnerable
6. Receptive
7. Open
8. Ready
9. Likely
10. Favorable
11. Apt
12. Favoring
13. Disinclined
14. Hesitant
15. Unwilling
16. Unfavorable
17. Unready
18. Unliable
19. Unsusceptible
20. Uninclined
21. Unvulnerable
22. Unreceptive
23. Unopen
24. Unlikely
25. Unfavorable
26. Unapt
27. Undisinclined
28. Unhesitant
29. Unfavorable
30. Unready

When it comes to finding synonyms for the word “prone”, there are many different ideas and options to choose from. Whether you are looking for a more formal word or a more casual one, there is sure to be an option that fits your needs. From words like “liable” and “disposed” to more informal words like “inclined” and “vulnerable”, there is a wide variety of synonyms to choose from. Additionally, if you are looking for words with a negative connotation, there are also words like “unwilling” and “unfavorable” that can be used. With so many different options, you are sure to find the best synonym for the word “prone” that fits your needs.