1. Synonym
2. Equivalent
3. Alternative
4. Parallels
5. Corresponding
6. Similar
7. Exchangeable
8. Comparable
9. Analogous
10. Identical
11. Counterpart
12. Twin
13. Facsimile
14. Replica
15. Substitute
16. Match
17. Parallel
18. Equivalent
19. Correlative
20. Homologous
21. Analog
22. Congener