Opsonize is a term that refers to the process of coating bacteria or other foreign particles with proteins to make them more susceptible to destruction by the immune system. There are several synonyms for opsonize that can be used in various contexts. To phagocytize, engulf, or ingest are some of the most common synonyms for opsonize. Other alternatives include to complement, facilitate, enhance, or augment. These words can be used interchangeably in scientific and medical literature, depending on the specific context and the desired emphasis of the text. In everyday language, synonyms for opsonize are less commonly used, and terms like coat, cover, or prepare may be more appropriate.