The phrase "top world" refers to the highest ranking or most important aspects of our planet. Some synonyms that can be used instead of "top world" include "the global elite," "world leaders," "top tier nations," "the highest echelon of society," and "global powerhouses." Each of these phrases refers to the upper echelon of individuals or nations that hold the most influential positions and make the most impactful decisions. The use of these synonyms can help add depth and variety to your language and provide more accurate and specific descriptions of the top players in the world.