| Word | Digits in Telephone Number |
|---|---|
| Hardback | 42732225 |
| Hardbake | 42732253 |
| Hardball | 42732255 |
| Hardboot | 42732668 |
| Hardcase | 42732273 |
| HardCore | 42732673 |
| Hardedge | 42733343 |
| Hardened | 42733633 |
| Hardener | 42733637 |
| Hardhack | 42734225 |
| Hardhats | 42734287 |
| Hardhead | 42734323 |
| Hardiest | 42734378 |
| Hardline | 42735463 |
| Hardness | 42736377 |
| Hardnose | 42736673 |
| Hardpans | 42737267 |
| Hardship | 42737447 |
| Hardtack | 42738225 |
| Hardtops | 42738677 |
| Hardware | 42739273 |
| Hardwire | 42739473 |
| Hardwood | 42739663 |