1. Apparatus
2. Device
3. Engine
4. Instrument
5. Machine
6. System
7. Tool
8. Contrivance
9. Construction
10. Gadget
11. Gizmo
12. Implement
13. Machinery
14. Operation
15. Process
16. Setup
17. Structure
18. Technology
19. Arrangement
20. Artefact
21. Contrivance
22. Fabrication
23. Formation
24. Gadgetry
25. Instrumentality
26. Manufacture
27. Organization
28. Production
29. Rig
30. Structure

When it comes to finding synonyms for the word “mechanism”, there are a plethora of ideas to choose from. Whether you’re looking for the best synonym for “mechanism” or other words for “mechanism”, there are plenty of options to choose from. For example, some of the most popular synonyms for “mechanism” include apparatus, device, engine, instrument, machine, system, tool, contrivance, construction, gadget, gizmo, implement, machinery, operation, process, setup, structure, technology, arrangement, artefact, contrivance, fabrication, formation, gadgetry, instrumentality, manufacture, organization, production, rig, and structure. Depending on the context, any one of these words can be used to replace “mechanism” in order to add variety to your writing.