First-class and Topmost

First-class adjective - Of the very best kind.

Topmost and first-class are semantically related In some cases you can use "Topmost" instead an adjective phrase "First-class".

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

First-class and topmost are semantically related in top topic. Sometimes you can use "First-class" instead an adjective "Topmost".

Nearby Word: top