Immunity refers to the ability of an organism to resist or defend itself against the harmful effects of foreign substances. There are various synonyms for immunity which include resistance, protection, defense, invulnerability, insusceptibility, and exemption. These words are commonly used to describe the body's natural defenses against infections, bacteria, and diseases. Resistance implies the power to withstand an attack or force, while protection refers to the act of shielding from harm. Defense connotes a proactive measure to prevent harm, while invulnerability suggests being impervious to the negative effects of a pathogen. Insusceptibility refers to the lack of responsiveness or sensitivity to a particular disease, and exemption implies being freed from the rules or laws governing others.