A cruiser is a type of warship. Modern cruisers are generally the largest ships in a fleet after aircraft carriers and amphibious assault ships, and can usually perform several operational roles from search-and-destroy to ocean escort to sea denial.
US Navy's Virginia-class cruiser USS Arkansas. The Virginia class was the last class of nuclear-powered cruisers in the US.
Russian Slava-class cruiser Marshal Ustinov
Marco Polo, the Royal Italian Navy's first armored cruiser
The Russian protected cruiser Aurora
A frigate is a type of warship. In different eras, the roles and capabilities of ships classified as frigates have varied.
A sailing frigate of 1802. The French Penelope.
Baden-Württemberg, lead ship of her class of frigates of the German Navy, currently the biggest frigates worldwide.
Light frigate, circa 1675–1680
Boudeuse, of Louis Antoine de Bougainville