Modifiers matching relic:

• biological,
• historical,
• wooden,
• cultural,
• underground,
• archeological,
• ancient,
• historic,
• dull,
• medieval,
• big,
• anthropological,
• aboriginal,
• precious,
• valuable,
• important,
• useful,
• military,
• indian,
• sacred,
• archaeological,
• secondary,
• mechanical,
• egyptian,
• traditional,
• buddhist,
• mysterious,
• curious,
• tiny,
• national,
• domestic,
• holy,
• european,
• prehistoric,
• artificial,
• interesting,
• african,
• architectural,
• west,
• personal,
• colonial,
• small,
• religious,
• beautiful,
• mundane,
• large,
• individual,
• industrial,
• old,
• organic,
• movable,

Simple categories matching prehistoric:

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