Modifiers matching obligation:

• primary,
• legal,
• ongoing,
• small,
• financial,
• professional,
• secure,
• outside,
• marketable,
• basic,
• ethical,
• regular,
• fixed,
• military,
• monetary,
• monthly,
• contractual,
• written,
• scholarly,
• signed,
• published,
• political,
• corporate,
• legislative,
• private,
• civil,
• governmental,
• moral,
• economic,
• safe,
• natural,
• public,
• sovereign,

Simple categories matching natural:

• issue,
• scene,
• material,
• object,
• passion,
• yarn,
• deposit,
• filling,
• phenomenon,
• cereal,
• fiber,
• infrastructure,
• stone,
• activity,
• knowledge,
• assembly,
• injustice,
• coffee,
• substance,
• medicine,
• process,
• person,
• cotton,
• origin,
• solid,
• case,
• assets,
• fibre,
• picture,
• relationship,
• aroma,
• setting,
• predator,
• tissue,
• contingency,
• function,
• debris,
• landmark,
• constituent,
• advantage,
• feature,
• subject,
• antimicrobial,
• happening,
• monument,
• means,
• albumin,
• fat,
• rarity,
• neutral,
• difficulty,
• behavior,
• flooring,
• excreta,
• prayer,
• procedure,
• repressor,
• characteristic,
• cortisone,
• catastrophe,
• cosmetic,
• drug,
• container,
• fluid,
• hill,
• use,
• task,
• flavor,
• sound,
• family,
• imperfection,
• botanical,
• experience,
• pause,
• ground,
• niche,
• prosody,
• whitener,
• texture,
• style,
• carbohydrate,
• porphyrin,
• magnitude,
• fuel,
• solute,
• oleoresin,
• treatment,
• haemoprotein,
• sulfate,
• pest,
• cloth,
• adhesive,
• drive,
• morality,
• area,
• representation,
• heat,
• ligand,
• way,
• beauty,
• disposition,
• scourge,
• philosophy,
• language,
• polysaccharide,
• latex,
• bait,
• organism,
• network,
• stimulant,
• scientist,
• fruit,
• feldspar,
• colloid,
• bivalve,
• light,
• syrup,
• resource,
• being,
• limit,
• attraction,
• matter,
• pharmaceutical,
• mineral,
• gradient,
• touch,
• antiseptic,
• pattern,
• ornament,
• food,
• surroundings,
• event,
• comparison,
• opiate,
• motion,
• source,
• law,
• look,
• virtue,
• siding,
• artifact,
• death,
• outflow,
• cycle,
• configuration,
• asphalt,
• peril,
• salve,
• coloring,
• disorder,
• foliage,
• measure,
• evacuation,
• chemical,
• elastomer,
• class,
• space,
• division,
• scent,
• satellite,
• acid,
• nail,
• swarm,
• monomer,
• entity,
• sense,
• nucleotide,
• antifreeze,
• corticosteroid,
• grouping,
• fence,
• essence,
• sport,
• crystal,
• pulse,
• discipline,
• variable,
• act,
• compound,
• matrix,
• starch,
• theme,
• orifice,
• nucleoside,
• land,
• asset,
• wax,
• ridge,
• marking,
• refrigerant,
• macromolecule,
• information,
• surfactant,
• prey,
• place,
• infection,
• preparation,
• peptide,
• protease,
• communication,
• precipitation,
• instrumentation,
• patch,
• antibiotic,
• shrine,
• wool,
• fare,
• background,
• spice,
• ester,
• goodness,
• nourishment,
• insect,
• narcotic,
• disaccharide,
• practice,
• vessel,
• disease,
• abrasive,
• perfume,
• polymer,
• rock,
• expression,
• metabolite,
• danger,
• healthcare,
• grain,
• earth,
• antacid,
• location,
• nuclease,
• impurity,
• sentiment,
• glass,
• interface,
• lubricant,
• fact,
• agent,
• amine,
• option,
• carotenoid,
• influence,
• colours,
• lake,
• humectant,
• deterioration,
• fluctuation,
• field,
• state,
• anomaly,
• composition,
• antioxidant,
• accident,
• dyestuff,
• anaesthetic,
• carcinogen,
• fodder,
• piece,
• carpet,
• hide,
• monosaccharide,
• response,
• boundary,
• sickness,
• sweetener,
• particle,
• heritage,
• contamination,
• religion,
• energy,
• audience,
• linen,
• butter,
• vortex,
• constraint,
• supply,
• mica,
• alkaloid,
• catalyst,
• activator,
• change,
• flavouring,
• smell,
• leaf,
• opening,
• hazard,
• surface,
• mixture,
• condiment,
• canal,
• plant,
• clay,
• world,
• inlet,
• malt,
• ways,
• gum,
• androgen,
• fauna,
• hemoprotein,
• cheese,
• phospholipid,
• technology,
• infirmity,
• article,
• design,
• community,
• rosin,
• music,
• leather,
• creation,
• slate,
• salt,
• power,
• flavour,
• organs,
• xanthine,
• distinction,
• beverage,
• zeolite,
• vice,
• elements,
• heating,
• abstraction,
• route,
• instrument,
• medium,
• metal,
• oil,
• treasure,
• lipid,
• work,
• beads,
• sign,
• progestin,
• progestogen,
• secretion,
• stimulus,
• creature,
• phosphoprotein,
• drink,
• steak,
• extract,
• endowment,
• course,
• science,
• consequence,
• host,
• obstacle,
• erosion,
• therapy,
• silicate,
• toxin,
• soil,
• incident,
• thing,
• inhabitant,
• impediment,
• enzyme,
• movement,
• point,
• aperture,
• barrier,
• aptitude,
• kind,
• component,
• cofactor,
• plasma,
• motive,
• molecule,
• textile,
• insulator,
• weaponry,
• stuff,
• hallucinogen,
• seasoning,
• region,
• laws,
• gem,
• exercise,
• society,
• electricity,
• feed,
• alloy,
• brine,
• product,
• protein,
• plaything,
• contaminant,
• mode,
• flaw,
• lecithin,
• symptom,
• desire,
• joint,
• attribute,
• insecticide,
• craft,
• marker,
• buffer,
• rhythm,
• triglyceride,
• cause,
• armor,
• herb,
• weave,
• glycoside,
• shelter,
• protection,
• structure,
• oligosaccharide,
• development,
• paint,
• whole,
• steroid,
• defect,
• braid,
• hypnotic,
• pulp,
• bone,
• shape,
• colouring,
• fish,
• feeling,
• herbicide,
• preservative,
• interaction,
• site,
• force,
• jewel,
• trap,
• tragedy,
• fur,
• scavenger,
• love,
• greenery,
• animal,
• tree,
• layer,
• jewelry,
• souvenir,
• attitude,
• hollow,
• firebreak,
• binder,
• emotion,
• data,
• separation,
• opium,
• dialogue,
• soap,
• starches,
• beast,
• repellent,
• worry,
• signal,
• obligation,
• factor,
• carnivore,
• shampoo,
• illusion,
• waterway,
• trait,
• rubber,
• emanation,
• calamity,
• image,
• wonder,
• ecosystem,
• variation,
• water,
• anesthetic,
• outbreak,
• support,
• thickener,
• formation,
• hair,
• hydrocarbon,
• territory,
• pathogen,
• loss,
• pollutant,
• blemish,
• torque,
• materiel,
• selection,
• body,
• disturbance,
• endorphin,
• figure,
• cover,
• flower,
• hormone,
• item,
• chromogen,
• excretion,
• skill,
• ordering,
• filament,
• decoration,
• perturbation,
• part,
• noise,
• stress,
• procreation,
• allergen,
• motif,
• derivative,
• system,
• unit,
• hydrocolloid,
• argument,
• mishap,
• pesticide,
• disaster,
• occurrence,
• impulse,
• sugar,
• vegetable,
• seafood,
• solution,
• eggshell,
• nut,
• property,
• diamond,
• radiation,
• fertilizer,
• incense,
• atom,
• elevation,
• resin,
• owner,
• personality,
• bristle,
• authority,
• group,
• lense,
• reproduction,
• token,
• order,
• obstruction,
• control,
• immunity,
• dish,
• wood,
• hardwood,
• depressant,
• speech,
• appearance,
• mound,
• waste,
• fabric,
• seed,
• wetland,
• attar,
• soup,
• quantity,
• illness,
• particulate,
• institution,
• faculty,
• period,
• grass,
• difference,
• dimension,
• nutrient,
• behaviour,
• ore,
• poison,
• flow,
• sorbent,
• cure,
• phytochemical,
• stream,
• cavity,
• makeup,
• quality,
• oestrogen,
• flora,
• toxicant,
• action,
• substrate,
• remedy,
• vitamin,
• filler,
• capital,
• sedative,
• mechanism,
• bones,
• fertiliser,
• flavoring,
• ventilation,
• foodstuff,
• god,
• plaster,
• passageway,
• environment,
• affection,
• bush,
• condition,
• building,
• relaxant,
• fragrance,
• break,
• interference,
• therapeutics,
• pigment,
• transformation,
• channel,
• commodity,
• lighting,
• cord,
• precursor,
• evolution,
• reservoir,
• glucocorticoid,
• membrane,
• foam,
• weapon,
• microorganism,
• ab,
• frame,
• zooplankton,
• reaction,
• metric,
• estrogen,
• evil,
• reed,
• passage,
• ambience,
• modality,
• conversation,
• habitat,
• vegetation,
• gemstone,
• vinegar,
• grassland,
• nature,
• green,
• color,
• wetness,
• scale,
• clone,
• alcohol,
• text,
• juice,
• operator,
• device,
• category,
• garbage,
• dielectric,
• indicator,
• hairstyle,
• sediment,
• catecholamine,
• diuretic,
• method,
• aggregate,
• conductor,
• form,
• carrier,
• herbivore,
• discharge,
• model,
• ingredient,
• situation,
• gas,
• micronutrient,
• dessert,
• clearing,
• coating,
• watercourse,
• ability,
• anticoagulant,
• emission,
• line,
• astringent,
• emulsifier,
• park,
• level,