Modifiers matching barrier:

• solid,
• physical,
• high,
• larger,
• flexible,
• outdoor,
• visual,
• nonmetallic,
• under,
• temporary,
• immovable,
• protective,
• artificial,
• animal,
• coastal,
• old,
• architectural,
• stable,
• suitable,
• continuous,
• real,
• surrounding,
• secure,
• natural,
• permanent,
• up,
• confining,
• resistant,
• fixed,
• geological,
• normal,
• effective,
• technical,
• positive,
• external,
• endothelial,
• institutional,
• disposable,
• level,
• penetrating,
• minor,
• visible,
• light,
• mechanical,
• permeable,
• new,
• significant,
• linear,
• low,
• static,
• moving,
• upright,
• passive,
• symbolic,
• structural,
• major,
• metallic,
• removable,
• regulatory,
• molecular,
• hard,
• conductive,
• physiological,
• simple,
• conventional,
• porous,
• reliable,
• exterior,
• defined,
• erect,
• residential,
• home,
• logical,
• multiple,
• rigid,
• vertical,
• opaque,
• behavioural,
• impenetrable,
• concrete,
• nonstructural,
• hydraulic,
• basic,
• moveable,
• impermeable,
• typical,
• small,
• thin,
• mobile,
• horizontal,
• accessible,
• over,
• thick,
• environmental,
• durable,
• chemical,

Simple categories matching up:

• pollution,
• property,
• thing,
• aircraft,
• food,
• activity,
• earring,
• fluid,
• formation,
• object,
• process,
• creation,
• item,
• paint,
• chemical,
• end,
• matter,
• ngo,
• matrix,
• housing,
• group,
• ingredient,
• project,
• waveform,
• pastime,
• treatment,
• fruit,
• content,
• machine,
• meal,
• fabric,
• vegetable,
• sport,
• ground,
• equipment,
• drug,
• salad,
• web,
• option,
• highway,
• foodstuff,
• behavior,
• line,
• location,
• organization,
• connection,
• organisation,
• prey,
• lake,
• style,
• metal,
• honey,
• inventory,
• condiment,
• therapy,
• sound,
• material,
• load,
• job,
• clothes,
• device,
• clothing,
• service,
• cosmetic,
• plant,
• design,
• meat,
• practice,
• fiber,
• fowl,
• arms,
• bait,
• band,
• provisions,
• extra,
• development,
• fuel,
• surface,
• force,
• universe,
• jewelry,
• code,
• veggie,
• fare,
• article,
• shelter,
• substance,
• edifice,
• obstruction,
• brain,
• sector,
• exercise,
• product,
• company,
• area,
• barricade,
• leftovers,
• unit,
• career,
• entity,
• institution,
• fungus,
• occupation,
• information,
• liquid,
• pistol,
• hay,
• souvenir,
• rodent,
• particle,
• implement,
• pasta,
• solute,
• garment,
• accessory,
• operation,
• performance,
• event,
• system,
• circuit,
• example,
• habitus,
• vice,
• ensemble,
• facility,
• debris,
• peripheral,
• delicacy,
• contaminant,
• devices,
• target,
• document,
• lighting,
• perishable,
• weapon,
• motion,
• textile,
• waste,
• care,
• tax,
• goody,
• assets,
• element,
• furniture,
• phone,
• deposit,
• effort,
• work,
• supply,
• tool,
• pattern,
• constituency,
• resource,
• details,
• seasoning,
• compound,
• model,
• structure,
• wall,
• publication,
• solid,
• contamination,
• weather,
• support,
• card,
• mixture,
• crud,
• poison,
• song,
• animal,
• profession,
• gun,
• dish,
• info,
• nutrient,
• stuff,
• elements,
• carbohydrate,
• essential,
• tradition,
• control,
• medium,
• pollutant,
• sugar,
• hardware,
• drink,
• payment,
• trifle,
• market,
• attribute,
• container,
• possession,
• game,
• rapper,
• music,
• business,
• barrier,
• trade,
• establishment,
• appliance,
• beverage,
• mineral,
• tissue,
• variation,
• file,
• special,
• lot,
• necessity,
• export,
• commodity,
• part,
• cause,
• toy,
• time,
• program,
• building,
• site,
• addiction,
• form,
• characteristic,
• molecule,
• impurity,
• egg,
• oil,
• id,