First class and Pearler

First class noun - Mail that includes letters and postcards and packages sealed against inspection.

Pearler and first class are semantically related. in excellent topic. In some cases you can use "Pearler" instead an adjective phrase "First class".

Pearler noun - A diver who searches for molluscs containing pearls.

First class and pearler are semantically related. Sometimes you can use "First class" instead an adjective "Pearler".