Antonyms for the phrase "makes vulnerable" include "protects," "secures," "strengthens," "fortifies," "shields," and "blocks." These words describe actions that create a sense of safety and security, rather than leaving someone or something open to harm or danger. For instance, if a building is fortified, it is less likely to be damaged during a natural disaster or attack. Similarly, if a person is protected, they are less vulnerable to physical, emotional, or other types of harm. These antonyms provide insights into the range of actions that can be taken to reduce vulnerabilities and increase resilience in various situations.