| Clue | Length | Answer |
|---|---|---|
| Case-hardened | 3 letters | set |
| Case-hardened | 4 letters | wont |
| Case-hardened | 5 letters | stony |
| Case-hardened | 6 letters | seared |
| Case-hardened | 6 letters | sullen |
| Case-hardened | 6 letters | steely |
| Case-hardened | 6 letters | run-in |
| Case-hardened | 6 letters | inured |
| Case-hardened | 6 letters | wonted |
| Case-hardened | 7 letters | steeled |
| Case-hardened | 7 letters | willful |
| Case-hardened | 7 letters | restive |
| Case-hardened | 7 letters | used-to |
| Case-hardened | 7 letters | trained |
| Case-hardened | 8 letters | seasoned |
| Case-hardened | 8 letters | stubborn |
| Case-hardened | 9 letters | toughened |
| Case-hardened | 9 letters | vitrified |
| Case-hardened | 9 letters | stiffened |
| Case-hardened | 9 letters | shameless |
| Case-hardened | 9 letters | tenacious |
| Case-hardened | 10 letters | reinforced |
| Case-hardened | 10 letters | solidified |
| Case-hardened | 11 letters | self-willed |
| Case-hardened | 12 letters | unregenerate |
| Case-hardened | 12 letters | stiff-necked |
| Case-hardened | 12 letters | strengthened |
| Case-hardened | 13 letters | strong-willed |
| Case-hardened | 13 letters | uncooperative |
| Case-hardened | 13 letters | thick-skinned |
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