Answer:
1. servants, citizens
2. earthenware (there is only one existing antonym)
3. cautious, careful
4. collection, deposit
5. helplessness, weakness
6. intellect, sage
7. illogic, insanity
8. rationality, judgement
9. beneficial, helpful
10. challenges, confutes
11. absurd, doubtful
12. inaudible, undetectable
Explanation:
These can all be found in the Merriam Webster Thesaurus.
