- Rajab2
- Rasāʼil (Anṣārī, Murtaḍá ibn Muḥammad Amīn)2
- Rawḍah al-bahīyah fī sharḥ al-Lumʻah al-Dimashqīyah (Shahīd al-Thānī, Zayn al-Dīn ibn ʻAlī)2
- Religious institutions2
- Resurrection (Islam)2
- Rhyme2
- Rifāʻī, Aḥmad ibn ʻAlī, 1106?-11822
- Rudra (Hindu deity)2
- Russia (Federation)--Dagestan2
- Rāmāyaṇa (Vālmīki)2
- Sabzavārī, Hādī ibn Mahdī, 1797 or 1798- Nibrās al-hudá2
- Samaritan Aramaic language2
- Samarqandī, Abū al-Qāsim ibn Abī Bakr, active 15th century. Risālah al-Samarqandīyah fī al-istiʻārāt2
- Sanskrit language--Etymology2
- Saʻīdī, Mīr Abū al-Fatḥ ibn Makhdūm, active 16th century. Ḥāshiyah ʻalá al-ʻAḍudīyah2
- Science2
- Second Advent2
- Sharḥ al-Mawāqif (Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf)2
- Sharḥ al-Qūshjī ʻalá Tajrīd al-ʻaqāʼid lil-Ṭūsī (Qūshjī, ʻAlī ibn Muḥammad)2
- Sharḥ al-ʻAqāʼid al-ʻAḍudīyah (Dawwānī, Muḥammad ibn Asʻad)2