Modifiers matching equid:

• large,
• extinct,
• wild,

Simple categories matching extinct:

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