While scavengers are consumers that rely on organic matter, National Geographic notes that producers (like plants and algae) create their own food from sunlight or chemicals.

If defined by its position in a specific interaction, the opposite of the eater (scavenger) is the eaten ( prey ).

Antonyms for Scavenger. noun. create, make, produce. 14 antonyms - opposite meaning. Power Thesaurus

While there are no "categorical" antonyms for the word , several terms serve as opposites depending on whether you are talking about biology, human behavior, or chemistry.