| Rating | Solver | Clue |
|---|---|---|
| INTRANSIGENCE | Inflexibility | |
| RIGIDITY | Inflexibility | |
| HARDNESS | Inflexibility | |
| IMPLACABILITY | Pitilessness, inflexibility | |
| INFLEXIBLENESS | The quality or state of being inflexible; inflexibility; rigidity; firmness. | |
| IRON | Strength; power; firmness; inflexibility; as, to rule with a rod of iron. | |