Modifiers matching survivor:

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

Simple categories matching prehistoric:

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