Simple categories matching planar:

• device,
• surface,
• medium,
• piece,
• structure,
• object,
• pattern,
• spread,
• region,
• part,
• scene,
• body,
• shape,
• figure,
• polygon,
• display,
• curve,
• layer,
• tissue,
• domain,
• form,
• flooring,
• area,
• feature,
• item,
• image,
• material,
• substrate,
• atom,
• artwork,
• system,
• mineral,
• waveguide,
• product,
• support,
• skin,
• phenol,
• imperfection,
• attribute,
• nature,
• circuit,
• line,
• group,
• sheet,
• article,
• defect,
• antenna,
• set,
• elements,
• hydrocarbon,
• hardware,
• fabric,
• compound,
• entity,
• fault,

Members with property planar:

• joint,
• square,
• wall,
• connection,
• painting,
• circle,
• triangle,
• intact_aircraft,
• ridge_waveguide,
• rectangle,
• circular_arc,
• carbonyl_carbon,
• stain,
• rib_waveguide,
• photograph_drawing,
• surface_defect,
• photograph,
• television_screen,
• sedimentary_stratum,
• web,
• ceiling,
• chiropractic_bench,
• asphalt,
• paper,
• textile_fabric,
• facade,
• pentagon,
• chlorite,
• floor,
• ridge_curve,
• fireplace_mantel,
• biscuit,
• symmetry,
• wood_sheet,
• fabric,
• integration,
• optical_fibre,
• imaging_array,
• fiberboard_sheet,
• plasma_display,
• strip_line,
• landscape,
• building,
• concrete,
• interface,
• illustration,
• city_street,
• clipboard,
• cloth,
• ridge,
• contact,
• matching_network,
• spiral_inductor,
• existing_mirror,
• rock_bed,
• polygon,
• exfoliation_joint,
• printing_plate,
• book_cover,
• nearby_wall,
• line,
• brain_slice,
• composite,
• simple_map,
• folder,
• insect_wings,
• television,
• silicone_substrate,
• rhombus,
• drawers,
• concrete_slab,
• shear_band,
• card,
• adhesive_member,
• indoor_floor,
• vehicle_body,
• card_board,
• rug,
• fold,
• roof_sheathing,
• concrete_floor,
• counter,
• heptagon,
• pc,
• index_cards,
• corrugated_cardboard,
• interferometer,
• coupler,
• dipole,
• glass_substrate,
• benzene,
• stainless-steel_sheet,
• street,
• hexagon,
• cement_sidewalk,
• planar_film,
• plate,
• display_screen,
• linoleum,
• lcd,
• carton,
• printed-circuit_board,
• door,
• polystyrene,
• sheet_material,
• patch_antenna,
• work,
• billboard,
• flow_band,
• thick_paper,
• fault,
• projection_display,
• poster,
• wire,
• frontal_face,
• crack,
• desk,
• corrugated_sheet,
• mitral_valve,
• flat_panel,
• roof_face,
• wings,
• jewellery_stone,
• picture,
• mica,
• wafer,
• coplanar_waveguide,
• wall_surface,
• airplane,
• document,
• aluminum_sheet,
• glass_slide,
• irregular_shape,
• discoloration,
• spiral,
• polypropylene_membrane,
• envelope_portion,
• parallel_line,
• knitwear,
• silicone,
• bonnet,
• cardboard,
• panel,
• bladder,
• liquid-crystal_display,
• leaflet,
• sheet-metal_member,
• cabinet,
• hood,
• stripe,
• box,
• plant_canopy,
• structured_plastic,
• cell_surface,
• exercise_bench,
• hardback_book,
• stacking_fault,
• electrophoresis_gel,
• half_plane,
• nucleotide,
• bedding_plane,
• oval,
• metal_plate,
• trapezoid,
• slide_frame,
• roof,
• biochip,
• edge,
• book,
• windows,
• newspaper,
• glassy_carbon,
• liquid,
• shear_surface,
• naphthalene,
• pyrene,
• thin_foil,
• parallelogram,
• screen,
• cardiac_valve,
• centered_polygon,
• amide,
• metal_card,
• abs_alloy,
• shelf,
• thin_plate,
• foliation,
• mosaic,
• window_sill,
• large_disc,
• continuous_entity,
• amide_moiety,
• neurotransmitter,
• steel,
• wing_spar,
• system,
• skin,
• mat_frame,
• stairs,
• nucleotide_base,
• synthetic_opal,
• semiconductor_substrate,
• alkene,
• membrane,
• infrared_system,
• corkboard,
• aircraft_wing,
• cabinet_drawers,
• kitchen-cabinet_door,
• retinal_rod,
• disc,
• building_facade,
• quartz,
• road,
• circular_disk,
• textile,
• drawing,
• image,
• glass,
• diaper,
• mirror,
• planar_antenna,
• plastic_sheet,
• deck,
• facade_elements,
• facet,
• banquet_table,
• flat_roof,
• sign,
• cement,
• film_projection,
• bedding,
• polymer,
• tiling,
• biotite,
• tile,
• carpet_material,
• office,
• dielectric_waveguide,
• lens_surface,
• horizontal_ceiling,
• plastic_bag,
• straight_wire,
• strand,
• paved_surface,
• notebook,
• hollow_organs,
• arc,
• abs,
• honeycomb,
• si,
• hornblende,
• patch,
• resonator,
• ellipse,
• ps,
• cellular_pattern,
• woven_fabric,
• print,
• planar_junction,
• window,
• table,
• pericardium,
• periodical,
• theater_display,
• quadrilateral,
• quadrangle,
• vinyl_paper,
• carpeting,
• stone,
• peptide,
• mo_devices,
• rigid_cardboard,
• thin_film,
• percolation_cluster,
• bench,
• computer,
• knit_goods,
• regular_polygon,
• dielectric_resonator,
• sheet,
• text,
• steroid,
• contact_surface,
• counter_top,
• cleavage,
• disk,
• plane,
• silicon_wafer,
• antenna,
• desk_top,
• metallic_plate,
• wheel,
• glass_piece,
• foil,
• microwave_resonator,
• vein,
• compact_disk,
• horizontal_surface,
• table_top,
• coplanar_circuit,
• filter,
• si_substrate,
• si_wafer,
• film,
• vertical_wall,
• terrace,
• fin,
• ring_resonator,
• face,
• building_side,
• slot_antenna,
• wedge,
• body_panel,
• limb,
• curved_slab,
• twin_fault,
• silicon,
• wing,
• rock_stratum,
• glass_windows,
• object,
• cubicle_wall,
• drywall_panel,
• glass_sheet,
• airway_wall,
• fault_plane,
• glass_panel,
• fascia,
• muscovite,
• drywall,
• planar_map,
• semiconductor_wafer,
• map,
• brick,
• octagon,
• blanket,
• refrigerator_door,