- Kaʻb al-Aḥbār, -655 or 6561
- Kaʻbah (Mecca, Saudi Arabia)1
- Kemalpaşazade, 1468 or 1469-15341
- Kemalpaşazade, 1468 or 1469-1534. Iṣlāḥ wa-al-īḍāḥ1
- Kemalpaşazade, 1468 or 1469-1534. Tafsīr al-Fātiḥah1
- Ketubah1
- Khalwatīyah1
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khiḍr (Legendary character)3
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)1
- Khūjahʹzādah, ʻAbd al-Naṣīr ibn ʻAbd Allāh, active 16th century. Taḥrīrāt ʻalá al-Ṭarīqah al-Muḥammadīyah1
- Kings and rulers1
- Knowledge, Theory of (Islam)2
- Kumayl ibn Ziyād, 633 or 634-7012
- Kāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)4
- Ladino language1
- Ladino literature1
- Language and languages--Philosophy3
- Language and languages--Style2
- Latin language9