- Shaykhī--Doctrines1
- Shihāb al-Dīn Aḥmad ibn Maḥmūd. Farāʼiḍ Shihāb al-Dīn1
- Shirwānī, Masʻūd ibn Ḥusayn, -1499 or 1500. Sharḥ ʻalá Risālah fī ādāb al-baḥth1
- Shirwānī, Muḥammad al-Amīn ibn Ṣadr al-Dīn, -1626 or 1627. Jihat al-waḥdah1
- Shāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)1
- Shīrāzī, Shukr Allāh ibn Qāsim. Mufīd al-Mukhtaṣar1
- Shīʻah1
- Sibṭ al-Māridīnī, Badr al-Dīn Muḥammad ibn Muḥammad, 1423- Risālah al-fatḥīyah1
- Siddhāntalakṣaṇa (Gaṅgeśa)1
- Siva (Hindu deity)1
- Substance (Philosophy)1
- Sujāʻī, Aḥmad ibn Aḥmad, -1783? Jawāhir al-muntaẓimāt fi ʻUqūd al-maqūlāt1
- Sujāʻī, Aḥmad ibn Aḥmad, -1783? ʻUqūd al-maqūlāt1
- Sullam al-ʻulūm (Bahārī, Muḥibb Allāh ibn ʻAbd al-Shakūr)1
- Sājaqlīzādah, Muḥammad ibn Abī Bakr, -1737. Tartīb al-ʻulūm1
- Taftāzānī, Masʻūd ibn ʻUmar, 1322-1389?1
- Taftāzānī, Masʻūd ibn ʻUmar, 1322-1389? Sharḥ al-Mukhtaṣar1
- Taftāzānī, Masʻūd ibn ʻUmar, 1322-1389? Sharḥ al-Shāfīyah1
- Tahdhīb Īsāghūjī1
- Talkhīṣ Miftāḥ al-ʻulūm (Qazwīnī, Jalāl al-Dīn Muḥammad ibn ʻAbd al-Raḥmān)1