Modifiers matching archosaur:

• extinct,

Simple categories matching extinct:

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