1. ʿAdl: a prescribed alteration from an underlying form.
2. Waṣf: adjectival status under further conditions.
3. Taʾnīth: a qualifying feminine form.
4. Maʿrifa: especially proper-name status together with another effective cause.
5. ʿUjma: qualifying foreign origin.
Do not treat every one of these labels as sufficient by itself. Zayd is a proper name, but it remains fully declinable.