1. Trace
2. Stroke
3. Boundary
4. Edge
5. Contour
6. Limit
7. Ribbon
8. String
9. Mark
10. Outline
11. Path
12. Trail
13. Division
14. Crease
15. Furrow
16. Score
17. Bound
18. Verge
19. Channel
20. Groove
21. Route
22. Rail
23. Cord
24. Strand
25. Seam
26. Limit
27. Margin
28. Perimeter
29. Thread
30. Border

When searching for the best ideas to express the concept of a line, it is important to consider the many synonyms available. Other words for line include trace, stroke, boundary, edge, contour, limit, ribbon, string, mark, outline, path, trail, division, crease, furrow, score, bound, verge, channel, groove, route, rail, cord, strand, seam, limit, margin, perimeter, thread, and border. Each of these words can be used to express the concept of a line in various contexts, from a literal line in a drawing to the figurative boundary of a relationship. With so many different words to choose from, it is easy to find the perfect word to express the idea of a line.