Modifiers matching dinosaur:

• prehistoric,
• horned,
• large,
• necked,
• carnivorous,
• new,
• quadrupedal,
• extinct,
• aquatic,
• bipedal,
• cretaceous,
• herbivorous,
• jurassic,
• armored,
• huge,
• flying,
• small,

Simple categories matching bipedal:

• creature,
• carnosaur,
• dinosaur,
• being,
• mammal,
• predator,
• animal,