The term "world karate federation" can be replaced with several synonyms depending on the context. One such synonym is "International Karate Federation" which is the governing body for karate worldwide. It regulates rules and regulations for karate competitions across the globe. Another synonym is "World Karate Organization" which promotes development and training of karate to all age groups. The term "World Karate Association" can also be used as it provides a platform for karate athletes to compete at an international level. Additionally, "International Traditional Karate Federation" can also be used as it focuses on traditional forms of karate. These synonyms can be used interchangeably and they all refer to organizations that promote and support the practice of karate globally.