WordNet records no synonym and no antonym for ring containment. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
a strategy of defense in cases of bioterrorism; vaccination only of people exposed and others who are in contact with them
“ring containment is a proven method of halting a smallpox epidemic”
Synonyms, antonyms and the broader and narrower relations for ring containment come from Princeton University’s WordNet. Full sources and licences.