Modifiers matching survivor:

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

Simple categories matching prehistoric:

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