Simple categories matching unseen:

• organism,
• entity,
• thing,
• spirits,
• being,
• agent,
• power,
• contaminant,
• body,
• creature,
• force,

Members with property unseen:

• payment_processor,
• angel,
• knowledge,
• mountain,
• god,
• mri_scan,
• deity,
• affection,
• desert_spirits,
• kindness,
• dragonfly,
• wind,
• dragon,
• planet,
• wind_shear,
• intention,
• night,
• gravity,
• asbestos,
• particle,
• storm,
• relationship,
• asteroid,
• virus,
• dirt,
• spirit_guide,
• bacteria,
• spirits,
• transnational_corporation,
• jinni,
• fungi,
• wormhole,
• love,
• electrical_power,
• light,
• devil,
• turbulence,
• fairy,
• magnetism,
• enemy,
• leadership,
• bones_inside,
• electricity,
• data_aggregator,
• comet,
• afterlife,
• corporation,
• witch,
• responsibility,
• insect_details,
• snow,
• river,
• germ_au,
• fractal,
• breath,