Many of Aristotle's theoretical terms, like "form", "actuality ", 'substance" and "cause ", have the formal features of relations: they have correlatives, and statements about them have the conversion that Aristotle finds characteristic of relata . This is no accident: in this way Aristotle can treat, say, the form of an individual substance as if it were a being in its own right without the danger of relapsing into Platonism . Moreover, as substance alone does not have this co-dependence on its accidents, thereby it has primacy of being. Understand the "accidents' here as "individual accidents ", like "this-here whiteness". This quality does not exist; rather its concrete paronym , "this-here white" does, but only as a complex of the individual quality with the substance.Universals are parts of individuals. Certain universals constitute their essences, as the genus animal is a constituent of the individual substance Socrates . No universal is a substance; even genera and species are so only secondarily. Likewise, the matter and form of an individual substance may constitute it, but only as its parts, which cannot exist independently, qua parts. Still, like relata , they may be treated as if they were independently. Abstract paronyms like rationality exist only in substances where they form complexes with them so as to produce the correlative concrete paronyms .