Modifiers matching human:

• ancient,
• modern,
• carnivorous,
• extinct,
• primitive,
• fossil,

Simple categories matching extinct:

• vertebrate,
• animal,
• archosaur,
• dinosaur,
• mammal,
• fauna,
• human,
• herbivore,
• creature,
• giant,
• predator,
• bird,
• ratite,
• organism,
• plant,
• relative,
• equid,
• amniote,
• beast,
• reptile,