| Dramatic opening? |
| Wharf structure |
| Farm structure is built in Switzerland's capital? |
| Unstable structure |
| Garden structure |
| Angled structure |
| Aircraft opening? |
| Agrarian structure, and a hint to the circled letters |
| Cellular opening? |
| Adobe structures? |
| Madison County structures |
| Chamber opening? |
| A recent opening? |
| Adjusted opening? |
| High opening? |
| Oater defense structure |
| Age opening? |
| Air-base structure |
| Ring-shaped structure formed over millions of years |
| A sci. of structure |
| Slight opening? |
| Dextrous opening? |
| Author of "Syntactic Structures |
| Bell opening? (and this puzzle's theme spelled out) |
| Physical opening? |
| Raised structure in a church |
| Lock opening? |
| Amtrak structure |
| Animal or plant structure |
| Steven's opening? |