| Efnisorð | Verk |
|---|---|
| WAIS-III | 1 |
| War conflict | 1 |
| War crimes | 1 |
| Warfare | 1 |
| Waste management | 1 |
| Waste oil | 1 |
| Wastewater | 2 |
| Wastewater treatment | 1 |
| Water framework directive | 1 |
| Water pollution | 1 |
| Waterbirds | 1 |
| Weather | 1 |
| Welfare | 1 |
| Westfjords | 1 |
| Whale watching | 2 |
| Whales | 1 |
| Whaling | 1 |
| WHODAS 2.0 | 1 |
| Whole genome sequencing (WGS) | 1 |
| Wild Atlantic Way | 1 |
| Wild Duck | 1 |
| Wild Duck, the | 1 |
| Wildlife area | 1 |
| Wildlife tourism | 1 |
| Wintris málið | 1 |