"Feeding on" can be replaced with a variety of synonyms that convey similar meanings. For example, "nourishing from," "consuming," "devouring," "ingesting," "preying upon," or "sustaining oneself on" can be used to describe the act of taking in food. Alternatively, "feeding off," "sucking sustenance from," and "extracting nutrients from" can describe relationships between organisms, such as parasitic or symbiotic interactions. Whether describing the diet of an individual or the interaction between species, there are many synonyms for "feeding on" that can add variety and depth to written or spoken language.