First class and Superior

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

Superior and first class are semantically related. in good topic. In some cases you can use "Superior" instead an adjective phrase "First class", when it comes to topics like pleasant, prime, best, top.

Superior adjective - Having a feeling of superiority that shows itself in an overbearing attitude.

First class and superior are semantically related. Sometimes you can use "First class" instead an adjective "Superior".

Nearby Words: superiority, superiorly, superioress