Express and First-class

Express noun - One that carries a message or does an errand.

First-class and express are semantically related. In some cases you can use "First-class" instead a noun "Express".

Nearby Words: expression, expressive, expressed, expressly, expressing

First-class adjective - Of the very best kind.

Express and first-class are semantically related. Sometimes you can use "Express" instead a noun phrase "First-class".