Simple categories matching subsurface:

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

Members with property subsurface:

• sewer,
• basement,
• formation_porosity,
• network,
• sedimentary_deposit,
• utility_conduit,
• pressure,
• peat,
• vault,
• paved_area,
• temperature,
• stratification,
• hot_crack,
• residual_stress,
• ore,
• test_pit,
• parking_garage,
• oil_saturation,
• dolomite,
• vertical_shaft,
• gas,
• depleted_oil,
• salinity,
• capillary_pressure,
• variation,
• irrigation_system,
• field,
• crack,
• virus_inactivation,
• water,
• soil,
• pit,
• soil_cover,
• hardness,
• bedrock_configuration,
• conduit,
• liquid,
• drain_conduit,
• moisture_content,
• soil_water,
• mining_tunnel,
• basement_relief,
• rn,
• moisture,
• deep_foundation,
• stone,
• bridge_pier,
• shaft,
• permeability,
• gas_reservoir,
• ocean-floor_topography,
• hard_surface,
• salt,
• decomposition,
• existence,
• spar_web,
• environmental_contamination,
• dam,
• dirt,
• shallow_bedrock,
• spacing,
• trash_pit,
• cavity_floor,
• structure,
• storage_pit,
• salt_dome,
• process,
• transport,
• drive,
• lithology,
• roughness_length,
• layer_depth,
• foliation,
• root_production,
• geophysical_data,
• containment,
• foundation,
• tree,
• magma_flow,
• depth,
• inclusion,
• wetland_soil,
• ore_body,
• sedimentary_basin,
• tunnel,
• pvc,
• slip_surface,
• tile_pipe,
• debris,
• earthquake,
• cable,
• sand,
• gold,
• rock_cavity,
• utility_vault,
• aquifer,
• limestone,
• gas-holder_foundation,
• ground-water_intrusion,
• highway_tunnel,
• fault_zone,
• fluid_saturation,
• void,
• rainfall,
• gravel,
• magma_intrusion,
• oxide,
• methane_gas,
• tile_field,
• sandbar,
• redox_condition,
• water_infiltration,
• stress,
• pipe,
• metal,
• geological_structure,
• tectonic_structure,
• spall_layer,
• layer,
• power,
• cavern,
• line,
• movement,
• building,
• pore_structure,
• clay,
• saturation,
• rock,
• sand_detection,
• reflectivity,
• fluid_pressure,
• leaching,
• oil_reserve,
• trash_metal,
• water_saturation,
• vegetation_state,
• oil,
• outdoor_lighting,
• preferential_pathway,
• perforated_pipe,
• porosity,
• density,
• caliche_layer,
• excavation_pit,
• dissolution,
• septic_tank,
• gypsum,
• utility,
• fragmented_rock,
• cistern,
• heart,
• artesian_pressure,
• microbial_production,
• clay_particle,
• foundation_wall,
• bulk_density,
• road_tunnel,
• manhole,
• dome,
• sedimentary_structure,
• infiltration,
• calcium,
• soil_porosity,
• joint,
• carbon_sequestration,
• water_content,
• ground_plane,
• pipeline,
• cellar,
• soil_thickness,
• subway,
• ramp,
• scratch,
• fluid_content,
• foreign_inclusion,
• ground,
• confining_layer,
• surface_structure,
• electric_line,
• drainage_density,
• adsorption,
• asphalt_layer,
• old_foundation,
• fill_area,
• absorption_field,
• vegetation,
• ventricular_system,
• mass_transport,
• sandstone,
• clay_layer,
• seismic_data,
• rail_tunnel,
• mine_access,
• moire_pattern,
• petroleum,
• collapsible_soil,
• chemical_composition,
• fault,
• hydrocarbon_trap,
• sandy_soil,
• ferric_oxide,
• rough_surface,
• basement_structure,
• hand_hole,
• garage,
• leaching_pool,
• oil_reservoir,
• core,
• mine,
• reservoir_pressure,
• soil_moisture,
• lava_tube,
• drain_pipe,
• change,
• construction,
• cavity,
• natural_gas,
• sump,
• fluid_viscosity,
• fold,
• indoor_area,
• bedrock_contour,
• deep_basement,
• soil_density,
• bunker,
• effluent_line,
• vent_pipe,
• glacial_till,
• anion_content,
• metallic_pipe,
• hard_rock,
• coarse_sand,
• fluid_motion,
• layer_thickness,
• utility_pipe,
• pavement_thickness,
• position,
• surface_lithology,
• clay_content,
• tank,
• sedimentary_layer,
• chemical,
• particle_size,
• sorption,
• particular_lithology,
• layer_silicate,
• silt,
• unsuitable_soil,
• soil_roughness,
• brine,
• formation_density,
• utility_line,
• fluid_flow,
• outfall_pipe,
• telephone,
• artesian_flow,
• velocity,