1. Origin
2. Source
3. Cause
4. Basis
5. Genesis
6. Foundation
7. Principle
8. Reason
9. Motive
10. Ground
11. Stimulus
12. Trigger
13. Start
14. Precedent
15. Antecedent
16. Provenance
17. Derivation
18. Parentage
19. Ancestry
20. Derivation
21. Root
22. Ancestor
23. Progenitor
24. Source of origin
25. Source of cause
26. Beginnings
27. Start point
28. First cause
29. Prime mover
30. Prime origin

When it comes to finding the best ideas for other words for “etiology”, there are a variety of options to explore. From “origin” and “source” to “ground” and “stimulus”, there are a number of synonyms that can be used to accurately describe the term. Additionally, words such as “basis”, “genesis”, “precedent”, “provenance”, “root”, “ancestor”, “source of origin”, “beginnings”, “start point”, “first cause”, “prime mover”, and “prime origin” can be used to further explain the concept of etiology. Whether you are looking for one word or multiple synonyms, there are a number of options to explore.