| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | hydrangea | Europe | Hydrangeas are popular ornamental plants in gardens and are often used in floral arrangements for weddings and events. | 1 |
| 2 | hydrangea | Europe | Popular ornamental plant for gardens and floral arrangements | 1 |
| 3 | hydrazine | Europe | Hydrazine is commonly used as a rocket propellant in the aerospace industry. | 1 |