1. Boundary
2. Limit
3. Edge
4. Periphery
5. Verge
6. Fringe
7. Brink
8. Extremity
9. Line
10. Limit
11. Verge
12. Threshold
13. Limit
14. Precipice
15. Juncture
16. Bound
17. Fringe
18. Limit
19. Line
20. Edge
21. Extremity
22. Terminus
23. Limit
24. Verge
25. Fringe
26. Line
27. Perimeter
28. Bound
29. Threshold
30. Termination

When searching for synonyms for the word “borderline”, it can be difficult to find the best ideas. However, with a bit of research, you can find a variety of words that are similar in meaning. Some of the most common synonyms for “borderline” include boundary, limit, edge, periphery, verge, fringe, brink, extremity, line, threshold, precipice, juncture, bound, terminus, perimeter, and termination. Each of these words has a slightly different nuance and can be used in various contexts. For example, when describing a physical boundary, a word like “limit” may be more appropriate than “verge.” It is important to consider the context of the word when selecting the best synonym.