Modifiers matching barrier:

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

Simple categories matching animal:

• food,
• ingredient,
• part,
• pathogen,
• litter,
• pest,
• sport,
• work,
• product,
• microorganism,
• blood,
• urine,
• feed,
• prey,
• performance,
• level,
• teeth,
• mixture,
• restraint,
• meat,
• cancer,
• set,
• protein,
• feature,
• health,
• science,
• excretion,
• matter,
• tissue,
• image,
• professional,
• transport,
• matrix,
• waste,
• film,
• proteinase,
• milk,
• feeder,
• gathering,
• illness,
• helminth,
• supply,
• facility,
• hide,
• structure,
• source,
• style,
• container,
• technology,
• fish,
• procedure,
• desire,
• industry,
• show,
• souvenir,
• disturbance,
• repellent,
• horn,
• requirement,
• behaviour,
• agriculture,
• farming,
• target,
• substance,
• metabolite,
• plankton,
• quality,
• unit,
• sacrifice,
• organisation,
• cause,
• body,
• disposal,
• egg,
• residue,
• protection,
• inhabitant,
• injury,
• experiment,
• spoor,
• park,
• constraint,
• property,
• mask,
• housing,
• data,
• meal,
• derivative,
• cartilage,
• shelter,
• model,
• symbol,
• plasmodium,
• drive,
• protease,
• taxon,
• hazard,
• activity,
• business,
• serum,
• display,
• artifact,
• response,
• bait,
• centre,
• pet,
• carrier,
• characteristic,
• community,
• manure,
• hair,
• polysaccharide,
• parasite,
• item,
• shampoo,
• excreta,
• sense,
• toy,
• gland,
• enterprise,
• component,
• bite,
• sample,
• welfare,
• relative,
• organism,
• infection,
• area,
• jewelry,
• pollinator,
• dance,
• steroid,
• contaminant,
• track,
• fodder,
• spine,
• decoy,
• constituent,
• origin,
• nutrition,
• marker,
• covering,
• livestock,
• offal,
• statue,
• tumour,
• byproduct,
• expert,
• creature,
• rotavirus,
• existence,
• physiology,
• sound,
• vocalization,
• perfume,
• avatar,
• use,
• record,
• thyroid,
• head,
• print,
• research,
• life,
• movement,
• predator,
• secretion,
• interaction,
• personality,
• feces,
• sting,
• host,
• wax,
• race,
• forage,
• smell,
• allergen,
• gum,
• artefact,
• fluid,
• bones,
• rennet,
• sign,
• excrement,
• disease,
• species,
• habitat,
• pattern,
• house,
• cat,
• clone,
• ride,
• voice,
• establishment,
• event,
• practice,
• pheromone,
• barrier,
• scavenger,
• clue,
• foodstuff,
• photography,
• embryo,
• resident,
• enzyme,
• tumor,
• creation,
• disorder,
• cell,
• pendant,
• figure,
• system,
• lipase,
• organs,
• criterion,
• evidence,
• magazine,
• noise,
• care,
• character,
• friend,
• vertebrate,
• worker,
• information,
• lover,
• nutrient,
• laws,
• agent,
• eyes,
• organ,
• contamination,
• call,
• form,
• farm,
• experimentation,
• endeavor,
• action,
• hybrid,
• picornavirus,
• process,
• wellbeing,
• material,
• mite,
• variable,
• ear,
• home,
• power,
• bedding,
• odor,
• study,
• education,
• enclosure,
• field,
• fur,
• biology,
• particle,
• carcass,
• ad,
• control,
• production,
• appendage,
• behavior,
• essence,
• sanctuary,
• microbe,
• scent,
• eukaryote,
• article,
• claw,
• trait,
• invertebrate,
• drug,
• attribute,
• poison,