- wabbler mirror
- WACCM
- Wackernagel's Law
- Wacker reaction
- Waclaw Potocki
- Wacousta
- Wacław Sieroszewski
- WADA
- Wadai Sultanate
- wadati–benioff zone
- WADC
- wadding
- Wade-Davis Bill
- Wade-Giles Spelling System
- Wade's rule
- Wadian Site
- wading across the stream by feeling the way
- wadi sheep
- Wad Medani
- Waelbroeck
- waelz process
- Waerden
- Wafa
- Wafangdian diamond deposit
- Wafangdian Shi