Boffo and First class

Boffo adjective - Of the very best kind.

First class and boffo are semantically related In some cases you can use "First class" instead an adjective "Boffo".

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

Boffo and first class are semantically related in excellent topic. Sometimes you can use "Boffo" instead an adjective phrase "First class".