WordNet records no synonym and no antonym for nuclear deterrence. 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.
the military doctrine that an enemy will be deterred from using nuclear weapons as long as he can be destroyed as a consequence
“when two nations both resort to nuclear deterrence the consequence could be mutual destruction”
Synonyms, antonyms and the broader and narrower relations for nuclear deterrence come from Princeton University’s WordNet. Full sources and licences.