1. Concerning
2. Regarding
3. In reference to
4. Relating to
5. Touching
6. Pertaining to
7. On the subject of
8. In respect to
9. In relation to
10. In connection with
11. Anent
12. Respecting
13. In regard to
14. With reference to
15. As regards
16. Concerning
17. With respect to
18. In the matter of
19. In relation to
20. Relevant to
21. In point of
22. Pertain to
23. In terms of
24. In connection with
25. In reference to
26. In respect of
27. In the case of
28. In regard to
29. In terms of
30. As for

When searching for different words to express the same idea, the best ideas are to use synonyms. Synonyms are words that have the same or similar meaning, and they can be used to express the same idea in different ways. For example, the word “regarding” can be replaced with words such as “concerning”, “in reference to”, “relating to”, “touching”, “pertaining to”, and many more. With a comprehensive list of synonyms, it is possible to find the best words to express your ideas. Using synonyms is a great way to make your writing more interesting and engaging.