Simple categories matching possible:

• illness,
• cause,
• fuel,
• process,
• infection,
• artifact,
• feature,
• substrate,
• means,
• chemical,
• information,
• eruption,
• condition,
• activity,
• contaminant,
• reaction,
• disorder,
• pathogen,
• virus,
• evidence,
• impurity,
• complication,
• event,
• transformation,
• defect,
• failure,
• disease,
• lesion,
• way,
• antigen,
• interaction,
• symptom,
• animal,
• material,
• list,
• fluid,
• specification,
• surface,
• assistant,
• indication,
• pathology,
• protease,
• thing,
• work,
• hazard,
• occurrence,
• germ,
• parasite,
• motion,
• malady,
• intermediate,
• sport,
• danger,
• sentence,
• contamination,
• sector,
• agent,
• organism,
• target,
• solution,
• volatile,
• layer,
• metal,
• ingredient,
• nexus,
• syndrome,
• pollutant,
• morbidity,
• modification,
• situation,
• group,
• problem,
• prey,
• form,
• disaster,
• precursor,
• allergen,
• rodent,
• equipment,
• request,
• system,
• place,
• mechanism,
• area,
• injury,
• predator,
• entity,
• conflict,
• incident,
• error,
• piece,
• bacteria,
• use,
• difficulty,
• extra,
• toxin,
• toxicant,
• facility,
• change,
• service,
• substance,
• theme,
• procedure,
• career,
• usage,
• precipitant,
• state,
• inflammation,
• comfort,
• action,
• development,
• opposition,
• poison,
• market,
• emotion,
• catastrophe,
• residue,
• acid,
• disturbance,
• entertainment,
• catalyst,
• abrasive,
• accident,

Members with property possible:

• elvis_landing,
• heat_application,
• bacteria,
• virus,
• fungal_infection,
• depression,
• inadequate_diet,
• osteoporosis,
• teaching,
• tetanus,
• certain_infection,
• hepatitis,
• bicycling,
• infection,
• sudan_orange,
• group,
• thyroid_disease,
• dejection,
• acetone,
• hiv,
• vitamin,
• block,
• tuberculosis,
• mold,
• asthma,
• cancer,
• controller_failure,
• bovine_tuberculosis,
• playing_pool,
• local_service,
• lint,
• message_communication,
• rat,
• magnifying_lense,
• electrode_material,
• chlamydia_infection,
• political_condition,
• crack,
• dioxin,
• aluminium,
• joy,
• magnesium,
• complete_darkness,
• printout,
• pid,
• infectious_disease,
• shopping,
• lichen_sclerosis,
• particle,
• structural_collapse,
• hypertension,
• foetal_death,
• aversion,
• dust,
• discomfort,
• bipolar_position,
• pain,
• nylon_carpet,
• sand,
• ra,
• holiday,
• mouse,
• dismemberment,
• improvisation,
• enzyme_activity,
• emotional_distress,
• storm,
• eosinophil_migration,
• balloon,
• music,
• building_collapse,
• trek,
• commonwealth_game,
• surgical_instrument,
• tumour,
• diverticulum,
• engine_fire,
• interference,
• golf,
• lens_opacity,
• road_building,
• heat_sensation,
• devastating_fire,
• rejection,
• tin,
• sacrifice,
• death,
• chest_irradiation,
• shopping_arcade,
• genetic_alteration,
• force_movement,
• infarct,
• avian_flu,
• bone,
• technical_factor,
• application_error,
• road_works,
• ira_bomb,
• volcanic_activity,
• psychological_factor,
• aortic_surgery,
• drinking_alcohol,
• nitrite_reduction,
• rheumatoid_arthritis,
• catastrophic_stroke,
• mouth_sore,
• oil,
• epilepsy,
• cat,
• arsenic,
• disappointment,
• electrode_product,
• mechanical_obstruction,
• heat,
• art_competition,
• facsimile,
• wheat,
• nausea,
• viral_infection,
• strong_allergy,
• sport_event,
• cosmetic,
• viral_disease,
• copper,
• avian_influenza,
• floor,
• earth_movement,
• research,
• urine,
• void_swelling,
• cords,
• petrol,
• parasite,
• gastrointestinal_disturbance,
• oxygen_gas,
• cigarette,
• exhibition,
• amount,
• oxide,
• falling_brick,
• dog,
• car-seat_cover,
• sars,
• drop,
• smoking,
• diet,
• substance_use,
• slipping_belt,
• debris,
• input_stream,
• soy,
• pancreatic_cancer,
• sea-level_rise,
• mobile_ion,
• application,
• infectious_stone,
• dermatitis,
• abdominal_pain,
• craft_activity,
• sulfate_reduction,
• mountain_torrent,
• government,
• alcohol,
• prize_draw,
• acid,
• shingles,
• cushing_disease,
• heat_flow,
• building,
• link_failure,
• telephone_list,
• gonorrhea,
• movement,
• gastroenteritis,
• harmful_vapors,
• intentional_disruption,
• coal,
• proteolytic_enzyme,
• timber_selling,
• soil_depth,
• influenza,
• dislocation,
• remote_access,
• kidney_problem,
• sandstone,
• communications,
• shame,
• glaucoma,
• gout,
• hostile_enemy,
• community_event,
• mining,
• successful_association,
• software_fault,
• natural_gas,
• liver_resection,
• sharp_corner,
• abdominal_pains,
• selective_breeding,
• atrazine,
• mini_golf,
• acetic_acid,
• cystic_fibrosis,
• tube,
• corrosion,
• formal_ball,
• tetracycline,
• protozoa,
• ergonomic_injury,
• phase_separation,
• bipolar_disorder,
• anemia,
• residual_grease,
• social_background,
• food_antigen,
• ball,
• stress,
• measles,
• frisbee_golf,
• plane_crash,
• necessary_medicine,
• failure,
• organ_transplantation,
• air_leak,
• water,
• microorganism,
• protease,
• landslide,
• field,
• stroke,
• natural_rubber,
• energy_transfer,
• wound_leak,
• drain,
• earth,
• habitat_loss,
• thing,
• stone,
• endotoxin,
• fish,
• tot_lot,
• anxiety,
• keratin,
• flood,
• corner,
• disk_failure,
• neurofibroma_lump,
• nervousness,
• patio,
• feral_cat,
• vascular_tumor,
• spinal_problem,
• refrigerator,
• resin,
• sadness,
• actinomycosis,
• wood,
• preparation,
• crop,
• yeast_infection,
• chemical,
• sociocultural_factor,
• wall,
• candida,
• intestinal_cancer,
• phenol,
• industry,
• bronchial_asthma,
• side_agreement,
• discussing_thing,
• rabies,
• sodium-chlorate_herbicide,
• mite,
• eye-movement_problem,
• shooting,
• reflection,
• haematuria,
• paintball,
• intestinal_parasite,
• protein,
• flea_allergy,
• rheumatoid_disease,
• pneumoconiosis,
• potato_gangrene,
• std,
• patient_selection,
• toxoplasmosis,
• natural_background,
• poor_diet,
• gas,
• mailman,
• light_refraction,
• anaemia,
• syphilis,
• wild_dog,
• treatment_history,
• contact_failure,
• phthisis,
• respiratory_movement,
• brain_injury,
• connection_time,
• system_failure,
• sailing,
• cam,
• community_days,
• numbness,
• forklift_attachment,
• reading_class,
• synchronization,
• resistance,
• agriculture,
• work,
• minor_program,
• inactive_link,
• apoptosis,
• pneumonia,
• rabbit,
• cooking,
• mange,
• pesticide_application,
• nursing,
• liver_problem,
• trypsin,
• urinary_fistula,
• air,
• schizophrenia,
• chicken_pox,
• medication_exposure,
• elves,
• disk_disease,
• gas_generation,
• microphone,
• benign_polyp,
• synthetic_material,
• place,
• coil,
• infection_control,
• radon_gas,
• peptic_ulcer,
• hours,
• er,
• household_dog,
• snowboarding,
• dirty_bomb,
• mercury,
• paedophile,
• dengue,
• medication,
• alcohol_use,
• moisture,
• power-law_decay,
• piscivorous_fish,
• occupational_therapy,
• international_coordination,
• internship,
• pesticide,
• legal_instrument,
• conference_presentation,
• conscious_alteration,
• competitor,
• heart_condition,
• standard_vessel,
• form,
• streak,
• product,
• electrical_shock,
• emphysema,
• infectious_agent,
• metastatic_carcinoma,
• building_demolition,
• vomiting,
• refrigerant_gas,
• release,
• vldl,
• exact_colors,
• dissolved_gas,
• construction,
• sun,
• muscular_dystrophy,
• bird,
• density,
• brain_cancer,
• close_friendship,
• rotation,
• earthquake,
• disk_herniation,
• hiv_infection,
• food,
• bronchitis,
• life,
• centipede,
• labour_movement,
• fungus,
• instrumental_resolution,
• cytomegalovirus_cmv,
• race_track,
• seasonal_cleanup,
• wood_smoke,
• teak_wood,
• worry,
• sand_placement,
• acetaldehyde,
• burn,
• systemic_yeast,
• computer,
• glass,
• fax_machine,
• tumor,
• dune_restoration,
• lymphatic_obstruction,
• gasoline,
• technical_failure,
• sabotage,
• salmonella,
• team_building,
• environment,
• energy,
• peace,
• force_protection,
• reflection_feature,
• dirt,
• background,
• fair_trade,
• golf_development,
• histamine_release,
• tension,
• grass,
• exhibition_gallery,
• pneumococcus,
• variation,
• information_flow,
• cloning,
• fishing,
• flea,
• listeria,
• motivation,
• coolant_leak,
• fluid,
• chronic_bronchitis,
• diabetes,
• metabolic_abnormality,
• gastrointestinal_parasite,
• unidentified_bacteria,
• cardiovascular_disease,
• olefin,
• hypothermia,
• golf-course_utility,
• dishwasher,
• heavy_grease,
• travel,
• mouth_breathing,
• silica,
• insurance_scheme,
• addiction,
• roof,
• floor_disinfectant,
• lymph_fistula,
• fistula,
• annoyance,
• splenectomy,
• zirconium,
• colonic_malignancy,
• treaty_ratification,
• mink,
• flu,
• crowd_size,
• ground_movement,
• hobbit,
• play,
• scale_change,
• theory,
• broken_glass,
• alumnus_day,
• workplace,
• soil,
• hedgehog,
• malignant_neoplasm,
• dizziness,
• demotion,
• chlamydia,
• spring,
• swimming-pool_trip,
• trade_mission,
• hernia,
• allograft_rejection,
• injection_mark,
• printing-ink_layer,
• natural_light,
• obstruction,
• electric_shock,
• crash_failure,
• biological_factor,
• granite,
• spa_testing,
• perianal_fistula,
• sulfuric_acid,
• service,
• interview,
• dwarf,
• atmospheric_dust,
• use,
• azide,
• cytokine_synthesis,
• telecommunication_devices,
• candle,
• warning_letters,
• ovarian_cancer,
• insecurity,
• cholera,
• stone_ball,
• head_ding,
• collagen_disease,
• possum,
• acceptance,
• stomach_ulcer,
• compressed_air,
• table,
• ammonia,
• racial_hatred,
• drug_use,
• slate,
• stethoscope,
• air_pollutant,
• polyp,
• pku,
• ink,
• nitrate_fertilizer,
• casino,
• thyroid,
• pet_waste,
• slope_condition,
• older_child,
• teaching_philosophy,
• doctoral_course,
• hadron_background,
• hallucination,
• skating,
• stray_cat,
• smoke,
• egg,
• dyspnoea,
• pancreatic_resection,
• dysentery,
• washing,
• laminar_organization,
• day_outing,
• sand_mining,
• letter,
• side,
• promotion,
• urine_infection,
• elbow_dislocation,
• dehydration,
• swelling,
• fluoride,
• anomalous_interference,
• fair,
• hole,
• ectopic_pregnancy,
• elevated_doc,
• nitrate,
• soil_particle,
• house_plant,
• process_invocation,
• scene,
• diurnal_bird,
• expansion,
• translation,
• breach,
• intestinal_lymphoma,
• silent_auction,
• nylon,
• frost_crack,
• loose_cable,
• localized_infection,
• maintenance_trouble,
• aircraft,
• academic_performance,
• persian-gulf_war,
• carbon,
• exchange_peak,
• craft,
• respiratory_infection,
• seasonal_change,
• cos,
• email,
• human,
• foil_papers,
• bowel_obstruction,
• congenital_syphilis,
• medication_side,
• poor_soil,
• smallpox,
• fingerprint,
• social_phobia,
• light,
• direct_mast,
• family_background,
• dust_control,
• latex,
• driveway,
• drug,
• metal,
• headache,
• thyroid_problem,
• milk,
• defective_thermostat,
• meningitis,
• cigarette_smoke,
• yeast,
• synaptic_reorganization,
• lymphoma,
• creation,
• electrical_failure,
• law_reform,
• redness,
• extensive_migration,
• program,
• anger,
• construction_material,
• human_dna,
• sugar,
• fungi,
• education,
• stress_corrosion,
• service_retail,
• subdural_empyema,
• skiing,
• planting_project,
• textile,
• superposition,
• eagle,
• reading,
• paint_sample,
• game,
• recreational_activity,
• strep,
• release_agent,
• woofer,
• additional_room,
• drug_interaction,
• connective,
• cytomegalovirus,
• tobacco_ash,
• honeymoon,
• carpet_roll,
• stretching,
• paint,
• selection,
• class_reunion,
• process_termination,
• ringing_state,
• corynebacterium,
• emulation,
• shared_pride,
• improvement,
• defensive_war,
• retail_development,
• corrugated_cardboard,
• telecommunication_machinery,
• demonstration,
• methanol,
• belt,
• device_error,
• sport_court,
• thyroid_dysfunction,
• sickle-cell_anaemia,
• monthly_allocation,
• trace_material,
• lawn_chemical,
• colours,
• wax,
• plant_oil,
• alcoholic_hepatitis,
• guilt,
• sand_particle,
• blockage,
• leak,
• insulin_resistance,
• birth,
• cephalopod,
• garden_craft,
• aluminum,
• aluminium_alloy,
• rubber,
• medical_care,
• ethanol,
• track,
• quartic,
• hydride,
• serious_illness,
• tb,
• major_landslide,
• cathode-ray_tube,
• reading_comprehension,
• database_corruption,
• cu,
• cohort_effect,
• oven,
• swimming,
• microbial_contamination,
• grease,
• lupus,
• leukemia,
• rash,
• sydenham_chorea,
• sport,
• acne,
• medicine,
• reorganization,
• salt,
• cataract,
• bed,
• nitrogen_compound,
• insect,
• fire,
• war,
• leopard,
• firebreak_construction,
• blood,
• ballast,
• fever,
• language_focus,
• rock,
• driver_list,
• excretion,
• hepatitis-c_virus,
• arthritis,
• country_trip,