يقال: عالم الأجسام، وعالم الأعراض، وعالم النباتات، وعالم الحيوانات، وعالم الجمادات
We speak of the world of bodies, accidents, plants, animals, and inanimate things.
ʿĀlam can name all creation collectively or one class within it. Bodies have spatial extension, whereas accidents refer to states and qualities that do not subsist independently. Plants, animals, and inanimate entities constitute another kind of classification.
These classifications overlap: a tree is both a plant and a body. Speaking of several 'worlds' does not imply several independent creators or entirely disconnected realms.