First class and Professional

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

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

Professional adjective - Of or relating to or suitable as a profession.

First class and professional are semantically related. Sometimes you can use "First class" instead an adjective "Professional".

Nearby Words: profession, professor, professed, professionalism, professionally