1. Alliance
2. Coalition
3. Bond
4. Combination
5. Merger
6. Joining
7. League
8. Federation
9. Association
10. Congregation
11. Accord
12. Amalgamation
13. Concurrence
14. Jointure
15. Unity
16. Harmony
17. Link
18. Unification
19. Entente
20. Agreement
21. Solidarity
22. Synergy
23. Partnership
24. Congruence
25. Conglomeration
26. Compound
27. Congruity
28. Linkage
29. Concord
30. Integration

When you are looking for synonyms for the word «union», there is no shortage of ideas. Whether you need one word or several, there are plenty of options to choose from. From the more common words such as alliance, coalition, and bond, to the lesser-known words such as amalgamation, jointure, and congruence, there is something for everyone. Each word carries its own unique connotation and can be used to accurately describe the concept of union. When searching for the best ideas for synonyms for union, consider words such as joining, league, federation, and association. These words provide a comprehensive understanding of the concept of union and can be used to accurately convey the idea in any context.