Copious and First-class

Copious adjective - Pouring forth in great amounts.

First-class and copious are semantically related. In some cases you can use "First-class" instead an adjective "Copious".

Nearby Word: copiously

First-class adjective - Of the very best kind.

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