| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | iron | metallurgy | Highly important in the production of steel and other alloys | 1 |
| 2 | iron | metallurgy industry | One of the most commonly used metals in manufacturing and construction | 1 |
| 3 | iron | traditional Indian metallurgy | Iron has historical and cultural significance in traditional Indian metallurgy, especially in the production of ancient weaponry. | 1 |