Here are a few possibilities:
* Autotroph: An autotroph is an organism that produces its own food through photosynthesis or chemosynthesis. They are the foundation of most food chains, while saprophytes break down dead organic matter.
* Holoparasite: A holoparasite is a plant that is completely dependent on another plant for its nutrients. Unlike saprophytes, which feed on dead material, holoparasites obtain their sustenance by directly tapping into the living tissues of their host.
* Predator: While predators consume living organisms, saprophytes consume dead organic matter. However, this is a broad distinction, and some organisms can be both predatory and saprophytic (e.g., some fungi).
Ultimately, the "opposite" of a saprophyte depends on the specific aspect you are considering.
