First-class and Finer

First-class adjective - Of the very best kind.

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

Finer adjective - (comparative of `fine') greater in quality or excellence.

First-class and finer are semantically related in excellent topic. Sometimes you can use "First-class" instead an adjective "Finer".