| 100% | CROWNPRINCE | 11 | Certain heir to the throne |
| 76% | ELDEST | 6 | Heir to the throne |
| 76% | PRINCE | 6 | Heir to the throne |
| 75% | FIRSTBORN | 9 | Heir to the throne, usually |
| 75% | ELDESTSON | 9 | Heir to the throne, traditionally |
| 73% | ELDEST | 6 | Heir to the throne, as a rule |
| 72% | ARN | 3 | Heir to the throne of Thule, in the comics |
| 70% | NEXT | 4 | With "in" and 41-Down, heir to the throne |
| 66% | ELDEST | 6 | Like the heir to the throne, usually |
| 65% | INFANTE | 7 | Son of a king of Spain or Portugal, especially one not heir to the throne |
| 63% | INFANTA | 7 | Formerly, a daughter of a king of Spain or Portugal who was not heir to the throne |
| 59% | LEONOR | 6 | Princess __, the heir to the Spanish throne |
| 58% | INFANTE | 7 | Spanish prince other than the heir to the throne |
| 58% | DAUPHIN | 7 | Title given to heir apparent of the French throne |
| 57% | SUCCESSOR | 9 | Heir or next in line to the throne |
| 56% | HEIR | 4 | ___ to the throne |
| 56% | SCION | 5 | Heir to the family fortune |
| 56% | PRETENDERS | 10 | Pseudo-claimants to the throne |
| 56% | GENX | 4 | Heirs to the boomer era |
| 55% | HEIRS | 5 | Successors to the throne |
| 54% | HEIR | 4 | ___ to the throne (prince, e.g.) |
| 54% | HEIR | 4 | ___ to the throne (next in line) |
| 54% | HEIR | 4 | __ to the throne; next in line |
| 53% | HEIR | 4 | __ to the throne (the next to reign) |
| 53% | SCION | 5 | Heir to a throne |
| 53% | ELDEST | 6 | First in line to the throne |
| 53% | HEIR | 4 | First in line to the throne |
| 52% | FIRSTBORN | 9 | Heir to a throne, typically |
| 52% | NEXT | 4 | "He's ___ in line to the throne" |
| 52% | PRETENDER | 9 | False claimant, e.g. to the throne |