1. Lockpick
2. Lever
3. Cipher
4. Clue
5. Passcode
6. Combination
7. Skeleton
8. Ingredient
9. Lock
10. Unlocker
11. Instrument
12. Keycard
13. Element
14. Lockout
15. Prerequisite
16. Master
17. Access
18. Token
19. Permit
20. Lockbox
21. Skeleton key
22. Keyhole
23. Combination lock
24. Combination code
25. Lock and key
26. Padlock
27. Detector
28. Keyway
29. Keychain
30. Opening

If you’re looking for ideas for other words for key, there are plenty of options to choose from. Synonyms like lockpick, lever, cipher, clue, passcode, combination, skeleton, ingredient, lock, unlocker, instrument, keycard, element, lockout, prerequisite, master, access, token, permit, lockbox, skeleton key, keyhole, combination lock, combination code, lock and key, padlock, detector, keyway, keychain, and opening can all be used to describe the same concept. Whether you’re looking for the best synonym for key or just a few ideas to get you started, this list of 30 words should provide plenty of inspiration.