Finest and First-class

Finest noun - A body of officers of the law.

First-class and finest are semantically related In some cases you can use "First-class" instead an adjective "Finest".

First-class adjective - Of the very best kind.

Finest and first-class are semantically related in prime topic. You can use "Finest" instead an adjective phrase "First-class", if it concerns topics such as best.