- Kirmānī, Maḥmūd ibn Muḥammad, 1329?-1404 or 1405. Farāʼiḍ al-ījāz1
- Kirmāstī, Yūsuf ibn ḥusayn, d. 1500. Wajīz fī al-uṣūl2
- Kufic1
- Kāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)19
- Kāfī (Kulaynī, Muḥammad ibn Yaʻqūb)3
- Kāfī al-mubtadiʼ min al-ṭullāb (Ibn Balabān, Muḥammad ibn Badr al-Dīn)1
- Kāshī, Jamshīd ibn Masʻūd, -approximately 1436. Sullam al-samāʼ1
- Lacquered bindings6
- Ladino language1
- Ladino literature1
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611
- Lamaʻāt (ʻIrāqī, Fakhr al-Dīn Ibrāhīm)1
- Laments6
- Land tenure1
- Land value taxation1
- Language and languages--Etymology1
- Language and languages--Philosophy4
- Language and languages--Style3
- Law1
- Laylat al-Qadr1