Copious and First class

Copious adjective - Pouring forth in great amounts.

First class and copious are semantically related In some cases you can replace phrase "First class" with "Copious", this terms are similar.

Nearby Word: copiously

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

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