Modifiers matching survivor:

• vulnerable,
• adaptive,
• prehistoric,
• rare,

Simple categories matching prehistoric:

• site,
• mammal,
• animal,
• artifact,
• giant,
• organism,
• critter,
• beast,
• tool,
• reptile,
• survivor,
• creature,
• monument,
• material,
• dinosaur,
• relic,
• artefact,
• item,