Interventionism refers to the policy of interfering in the affairs of other countries or nations. The word interventionism can be replaced with other synonyms that convey similar meanings. Some of the synonyms for interventionism include meddlesomeness, intervention, interference, meddling, and involvement. Another synonym for the word interventionism is interventionist policy, which means the same as intervening in the affairs of other countries. Other synonyms that can be used instead of interventionism include activism, intrusion, and intercession, all of which can be used depending on the context. Ultimately, when discussing international affairs, it is crucial to choose the right synonym that accurately reflects the intended meaning and tone of the discussion.