Simple categories matching circular:

• object,
• material,
• item,
• elevation,
• space,
• activity,
• sandwich,
• feature,
• construction,
• article,
• structure,
• product,
• coin,
• figure,
• membrane,
• flower,
• entity,
• reflector,
• opening,
• fixture,
• wreath,
• shape,
• dna,
• plate,
• member,
• solid,
• wall,
• part,
• container,
• area,
• configuration,
• form,
• conduit,
• surface,
• motion,
• cylinder,
• thing,
• chamber,
• canister,
• food,
• basin,
• instrument,

Members with property circular:

• dome,
• aperture,
• plate,
• cylinder,
• oatmeal_container,
• sphere,
• circular_fountain,
• silo,
• button,
• wheel,
• ice-cream_tub,
• cup,
• tower_mast,
• flexible_hose,
• drumhead,
• sock,
• cheesecake,
• polygon,
• face,
• tyre,
• cane,
• shaft,
• donut,
• cd,
• coated_optics,
• corona,
• process,
• circle,
• shovel_handle,
• annulus,
• pipe,
• bowl,
• container,
• bottle,
• oval,
• doughnut,
• recording_disk,
• paper-towel_tube,
• pupil,
• pizza,
• consecrated_wafer,
• train,
• jar_lid,
• film_case,
• mirror,
• contour,
• shell,
• picture,
• circular_hole,
• column,
• leaf,
• pie_shape,
• stream,
• square_cylinder,
• hole,
• spinner,
• pressure_bottle,
• round_lid,
• pin,
• conduit,
• tortilla,
• compact_disc,
• teacup_plate,
• escapement_wheel,
• capital,
• doily,
• pin_hole,
• coffee-can_top,
• saucer,
• tabletop,
• tank_cover,
• roller,
• optical_fiber,
• acceleration,
• manhole_frame,
• dowel,
• knothole,
• lymphocyte,
• baby_bootie,
• wreath,
• drum_skin,
• container_lid,
• cooling,
• barrels,
• railroad_wheel,
• tree_disk,
• biscuit,
• ridge,
• plastic_lid,
• arachnoid,
• torus,
• dowel_rod,
• sleeve,
• johnson_counter,
• funnel,
• keg,
• wire,
• storage_drum,
• trunk_roll,
• tank,
• circular_bowl,
• mt_dna,
• speech,
• canister,
• serpent_mound,
• mausoleum,
• tube,
• spiral_configuration,
• plate_cup,
• dime,
• potter_wheel,
• split_orange,
• circular_plate,
• external_shock,
• tubing,
• mound,
• tree,
• shallow_dish,
• bottle_cap,
• finger,
• wood_disk,
• paint,
• head,
• glassware,
• circular_landmark,
• tin,
• cavity,
• relaxed_circle,
• bullet,
• chamber,
• thick_crayon,
• mat,
• finger_ring,
• smokestack,
• turret,
• paper,
• small_article,
• seed,
• wooden_bowls,
• straw,
• crown,
• frozen_juice,
• orange,
• baptistery,
• textile_pattern,
• small_arms,
• sunflower,
• atom,
• cyclic_period,
• mandala,
• frisbee,
• carrot,
• tree_dibble,
• pit,
• planter,
• spiral,
• tire_tread,
• shallow_bowls,
• sponge,
• large_dome,
• small_hole,
• hoops,
• drilled_shaft,
• stockpile,
• rocket_case,
• beauty_dish,
• glass,
• jar,
• typhoon,
• hard_candy,
• centripetal_acceleration,
• lid,
• transporting_belt,
• tip,
• solar_system,
• outer_diameter,
• metal,
• pattern,
• grape,
• disk,
• piston_head,
• bearing,
• heat-exchanger_tube,
• arc,
• christmas_wreath,
• silo_floor,
• bar_stock,
• glasses,
• ring_flash,
• tire_core,
• colored_skin,
• common_tubing,
• round_seal,
• wave,
• reservoir,
• cookie,
• disc,
• penny,
• bolt,
• orbit,
• hat,
• meniscus,
• mug,
• cable,
• inner_diameter,
• grain,
• leg,
• volcano,
• black_paint,
• bowls,
• light_fixture,
• pill,
• spherical_segment,
• expansion,
• belt,
• ceiling_centre,
• petal,
• drum,
• hula_hoop,
• tire,
• diaphragm,
• compressor_turbine,
• telephone_diaphragm,
• container_jar,
• plastic_bottle,
• spool,
• pencil,
• flange,
• wall_plaque,
• best_cockpit,
• hamburger,
• sink_hole,
• grain_bin,
• piece,
• seal,