Uppermost and World-class

Uppermost adjective - Being at a point or level higher than all others.

World-class and uppermost are semantically related. in chief topic. In some cases you can use "World-class" instead an adjective "Uppermost".

World-class adjective - Ranking above all others.

Uppermost and world-class are semantically related. Sometimes you can use "Uppermost" instead an adjective phrase "World-class".