| Answer | Crossword Clue |
|---|---|
| twonesses | TWONESS, duality (the state of being twofold) |
| dualities | DUALITY, the state of being twofold |
| twoness | duality (the state of being twofold) |
| twofoldness | the state of being twofold |
| duality | the state of being twofold |
| twofoldnesses | TWOFOLDNESS, the state of being twofold |
