Non-proliferation
Part of speech: adjective
Definition: leading to an end to the acquisition of nuclear weapons by countries that do not already have them
Nonproliferation
Part of speech: noun
Definition: stopping proliferation of nuclear weapons
Non-proliferation as an adjective is leading to an end to the acquisition of nuclear weapons by countries that do not already have them while Nonproliferation as a noun is stopping proliferation of nuclear weapons
Part of speech: adjective
Definition: leading to an end to the acquisition of nuclear weapons by countries that do not already have them
Part of speech: noun
Definition: stopping proliferation of nuclear weapons
We hope you now know whether to use Non-proliferation or Nonproliferation in your sentence.