Synonyms of the word

immunization

• n. (US, uncountable) The process by which an individual is safely exposed in a controlled manner to a material…
• n. (US, countable) One such exposure.

immunisation

• n. (Britain, immunology) Alternative spelling of immunization.

protection

• n. The process of keeping (something or someone) safe.
• n. The state of being safe.
• n. A means of keeping or remaining safe.
• n. A means, such as a condom, of preventing pregnancy or sexually transmitted disease.
• n. (insurance) Coverage.
• n. Immunity from harm obtained by illegal payments, as bribery or extortion.
• n. (economics) Restrictions on foreign competitors which limit their ability to compete with domestic producers…
• n. (computing) An instance of a security token associated with a resource (such as a file).