Ace and World class

Ace adjective - Having or showing exceptional knowledge, experience, or skill in a field of endeavor.

World class and ace are semantically related In some cases you can use "World class" instead an adjective "Ace".

Ace and world class are semantically related in best topic. Sometimes you can use "Ace" instead an adjective phrase "World class", if it concerns topics such as superior, excellent, optimum.