Nuclear weapons are a type of weapon that use the energy released from nuclear reactions to cause destruction. DETERRENCE, which is a ten letter word, is the policy of using the threat of retaliation to prevent an attack. This is often used in relation to nuclear weapons, as the threat of mutually assured destruction is a powerful deterrent. H-bombs, which is a six letter word, is another term for hydrogen bombs, which are a type of nuclear weapon that releases a large amount of energy from nuclear fusion reactions.