1. Additional
2. Supplemental
3. Extra
4. Secondary
5. Accompanying
6. Ancillary
7. Appurtenant
8. Auxiliary
9. Supplementary
10. Subsidiary
11. Complementary
12. Complementing
13. Concomitant
14. Corollary
15. Dependent
16. Enhancing
17. Incidental
18. Linking
19. Modifying
20. Peripheral
21. Reinforcing
22. Related
23. Subordinate
24. Supporting
25. Tertiary
26. Contributing
27. Adjunct
28. Connective
29. Derivative
30. Accessory

Finding the right synonyms for a word can be a challenge. Fortunately, there are many resources available to help you find the best ideas for synonyms. For example, when looking for another word for «aux,» you can consult a thesaurus or search online for ideas. You can also use tools like WordHippo to help you find the best synonyms for any word. Additionally, you can use online forums and websites to ask for suggestions from other people. Whatever resource you choose, it is important to make sure you are picking the right words that accurately reflect the meaning of the original word.