- Twelfth century1
- Umm al-barāhīn fī ʻilm al-kalām (Sanūsī, Muḥammad ibn Yūsuf)1
- Unmūdhaj fī al-naḥw (Zamakhsharī, Maḥmūd ibn ʻUmar)1
- Urjūzah al-Raḥbīyah (Ibn al-Mutafanninah, Muḥammad ibn ʻAlī)1
- Utraquists1
- Vellum wrappers1
- Vices1
- Virtues1
- Volvelles1
- Vows1
- Wajīz (Ghazzālī)1
- Waqf1
- Wardships, etc.1
- Warsh al-Miṣrī, ʻUthmān ibn Saʻīd, 728 or 729-812 or 8131
- Water rights1
- Weather forecasting1
- Weight gain1
- Wigmore Abbey (Wigmore, Herefordshire, England)1
- Willoughby, Richard, Sir1
- Wills, Ethical1