| Word | Digits in Telephone Number |
|---|---|
| Optatives | 678284837 |
| Opthalmic | 678425642 |
| Optically | 678422559 |
| Opticians | 678424267 |
| Opticists | 678424787 |
| Optimally | 678462559 |
| Optimised | 678464733 |
| Optimiser | 678464737 |
| Optimises | 678464737 |
| Optimisms | 678464767 |
| Optimists | 678464787 |
| Optimized | 678464933 |
| Optimizer | 678464937 |
| Optimizes | 678464937 |
| Optionals | 678466257 |
| Optionees | 678466337 |
| Optioning | 678466464 |
| Optometry | 678663879 |