Modifiers matching amniote:

• higher,
• extinct,
• oviparous,
• lower,
• aquatic,

Simple categories matching extinct:

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