First and World-class

First adjective - Ranking above all others.

World-class is a synonym for first. In some cases you can use "World-class" instead an adjective "First".

Nearby Word: firstly

World-class adjective - Ranking above all others.

First is a synonym for world-class in best topic. You can use "First" instead an adjective phrase "World-class", if it concerns topics such as superior, excellent.