| Answer | Crossword Clue |
|---|---|
| stiffer | Not easily bent or changed in shape; rigid |
| stiffest | Not easily bent or changed in shape; rigid |
| rigidly | RIGID, stiff (not easily bent) |
| rigidest | RIGID, stiff (not easily bent) |
| hardset | rigid (stiff (not easily bent)) |
| rigider | RIGID, stiff (not easily bent) |
| rigidity | the state of being rigid (stiff (not easily bent)) |
| rigidities | RIGIDITY, the state of being rigid (stiff (not easily bent)) |
