The competing philosophical categories include hayūlā (prime matter), ṣūrah (form), ʿaql (intellect), and nafs mujarradah (immaterial soul). These matter because an exhaustive account of noncomposite realities cannot simply omit them.
Prime matter: a proposed fundamental material principle.
Form: a principle of actual determination or structure.
Intellect and immaterial soul: realities some philosophers classed as distinct from bodily parts.
This is a description of historical doctrines, not an affirmation that all such realities have been established. Each requires its own argument.