When it comes to synonyms for "guards against," there are several options to choose from. One option is "protects," which connotes a sense of safety and security. Another is "safeguards," which emphasizes the idea of preventing harm or danger. "Defends" is another synonym that implies actively protecting against potential threats. "Shields" and "secures" are also options that suggest providing a barrier or a force field against potential risks. Ultimately, choosing the right synonym for "guards against" will depend on the context and the connotations you want to convey.