Assault cruiser

An assault cruiser is a starship classification used by at least the Cardassian Union and the Klingon Empire.

In the Cardassian military an assault cruiser was in essence a heavy battle cruiser and in some cases could operate as carriers. 

In the Klingons often describe their assault cruisers as "larger more powerful fighters" and they were often tasked with leading squadrons of attack fighters. Some of the larger assault cruiser designs were also meant to function as carrier vessels.