| Curved |
| Vaulted |
| Like vaults |
| Like a vault |
| Curved (over) |
| Like an insole |
| Formed a curve |
| Like some backs |
| Curved, as a sole |
| Like some windows |
| Like some eyebrows |
| Bent over backward |
| Like many doorways |
| Like a gateway, often |
| Like a curious eyebrow |
| Having a curved doorway |
| Colosseum entrance, e.g. |
| Like many Roman viaducts |
| Like an upraised eyebrow |
| Like an angry cat's back |
| Like insteps and rainbows |
| Like a frightened cat's back |