| Clue | Source | Date |
|---|---|---|
| Part of your heart's constant burden | ||
| -- arteriosus, the upper front part of the right ventricle of the heart | The Telegraph General Knowledge | 27 Jan 2020 |
| Pyramid-shaped shell | ||
| The lower 48, in Pentagon-speak | ||
| Mainland America, for short | ||
| Latin for a tapered solid. |