The phrase "nuclear weaponry" refers to weapons that use the powerful energy released by atomic reactions. These weapons can cause widespread destruction and are considered extremely dangerous. Full definition
I have sympathy with Sir Malcolm's point that a reduction in nuclear weaponry would reduce the possibility of terrorists getting their hands on fissile material but not with his implications for the nuclear ambitions of Iran and North Korea. (conservativehome.blogs.com)
The meeting continued with an open, yet orderly, discussion about the potential danger of nuclear weaponry in North Korea. (eagleeye.news)
National capitals reverberated to Israeli Prime Minister Benjamin Netanyahu's speech Monday that Israeli intelligence had discovered Iranian secret archives containing «among other things, blueprints, charts, photos, videos and presentations dealing with nuclear weaponry.» (cnbc.com)