Environmental Studies
- water potential
- Water quality
- Water storage
- Water Treatment
- water-absorption test
- wave clouds
- wave refraction
- weathering profile
- weathering zone
- West African rain-forest floral region
- West and Central Asiatic floral region
- western intensification
- wet-bulb thermometer
- whitings
- Wildlife
- Wilson cycle
- wilt
- wilting
- Windermere interstadial
- windrow