Modifiers matching cavity:

• mucosal,
• natural,
• thoracic,
• underground,
• dead,
• small,
• internal,
• abdominal,
• anatomical,
• available,
• artificial,
• peripheral,
• nearby,
• simple,
• hollow,
• micro,
• thin,
• subsurface,
• neighboring,
• inner,
• sensitive,
• organic,
• deep,
• vascular,
• negative,
• pelvic,
• moist,
• complex,
• closed,
• large,
• major,
• adjacent,
• dark,
• secretory,
• accessible,
• intermediate,
• cardiac,
• uterine,
• interior,
• over,
• tubular,

Simple categories matching subsurface:

• quantity,
• variation,
• structure,
• material,
• void,
• measure,
• condition,
• area,
• platform,
• rock,
• feature,
• separation,
• property,
• utility,
• body,
• mineral,
• layer,
• facility,
• sorbent,
• formation,
• imperfection,
• anomaly,
• fluid,
• component,
• change,
• object,
• variable,
• data,
• process,
• stratum,
• system,
• deposit,
• attribute,
• resource,
• information,
• installation,
• soil,
• artifact,
• reservoir,
• construction,
• liquid,
• obstruction,
• drain,
• defect,
• industry,
• cavity,
• excavation,
• detail,
• item,