Simple categories matching fierce:

• bird,
• person,
• warrior,
• fish,
• creature,
• predator,
• sidekick,
• elephant,
• storm,
• demon,
• movement,
• carnivore,
• cat,
• animal,
• beast,
• color,
• pet,

Members with property fierce:

• carnivorous_beast,
• Chewbacca,
• descent,
• tasmanian_devil,
• Red_Sonja,
• Xena,
• tigers,
• crocodile,
• clockwork_beast,
• Jaime_Lannister,
• wild_boar,
• Conan_the_Barbarian,
• lynx,
• jaguar,
• tyrannosaurus,
• rhinoceros,
• she-devil,
• lion,
• dragon,
• sidekick,
• Reginald_Jeeves,
• roaring_lion,
• hound,
• sabertooth_cat,
• cheetah,
• anaconda,
• warrior,
• raptor,
• seahorse,
• bat,
• hyena,
• hippopotamus,
• Eddard_Stark,
• wolf,
• rapid_acceleration,
• wild_dog,
• wild_buffalo,
• shark,
• dog,
• leopard,
• vulture,
• falcon,
• hurricane,
• red,
• intoxicated_elephant,
• demon,
• hawk,
• rhino,
• bull,
• grizzly,
• ascent,
• eagle,
• copilot,
• mammoth,
• panther,
• elephant,
• gorilla,
• horse,
• snake,
• tiger,