Simple categories matching nasty:

• sickness,
• weapon,
• illness,
• thing,
• stuff,
• disease,
• microbe,
• component,
• pathogen,
• creature,
• chemical,
• germ,
• bacteria,
• infection,
• disorder,
• content,
• pest,
• insect,
• material,
• animal,
• happening,
• item,
• predator,
• weather,
• preservative,
• parasite,
• emotion,
• virus,
• software,
• bug,
• vice,
• beast,
• critter,
• condition,
• program,
• cause,
• compound,
• std,
• allergen,
• contaminant,
• substance,

Members with property nasty:

• virus,
• mercury,
• raccoon,
• excessive_profanity,
• typhoid,
• scrapie,
• yogurt,
• impotence,
• trojan,
• advertisement,
• chlamydia,
• parvo_virus,
• arsenic,
• worm,
• turpentine,
• cyanogen_bromide,
• cancer,
• blast_armor,
• rat,
• herpes,
• light_falloff,
• hepatitis,
• blood,
• trichloroethylene_tce,
• spider,
• cockroach_spider,
• desire,
• slug,
• melting,
• rivalry,
• lead,
• animal_testing,
• strychnine,
• formaldehyde,
• chigger,
• staphylococcus,
• milkweed_bug,
• wolf,
• bronchitis,
• death,
• arab,
• poop,
• mold,
• sex,
• insect_venom,
• colouring_agent,
• syphilis,
• grease,
• phosphorus,
• sore_breast,
• pneumococcus,
• insanity,
• common_cold,
• smoke,
• yellow_teeth,
• pipe_dope,
• dog_dirt,
• people,
• shark,
• aubergine,
• oil,
• red_shell,
• constipation,
• possum,
• cadmium,
• spyware,
• benzene,
• dioxin,
• condom,
• tar,
• cholera,
• genital_wart,
• pneumonia,
• glue,
• snake,
• listeria,
• soap,
• tornado,
• envy,
• change,
• streptococcus,
• portable_heater,
• gelatin,
• paint,
• nail-polish_remover,
• savings_plan,
• mild_acid,
• brain,
• arson,
• steep_grade,
• heart,
• staph,
• flea,
• chromatic_aberration,
• plastic,
• carbon,
• harmful_parasite,
• fecal_streptococcus,
• yeast_infection,
• shoes,
• dysentery,
• weeds,
• ghost,
• sealer,
• spite,
• composition,
• flu,
• asbestosis,
• mink,
• sugar,
• hurricane,
• fact,
• scorpion,
• curve,
• osprey,
• cat,
• deadly_melanoma,
• pollution,
• giardia_infection,
• phosphate,
• nighthawk,
• phosphorus_bomb,
• robbery,
• cockroach,
• car_oil,
• microscopic_cat,
• graphic_depiction,
• olive,
• autism,
• bilharzia,
• banana,
• deer,
• caustic_alkali,
• smallpox,
• animal,
• shigella,
• pesticide,
• ammonia,
• klebsiella,
• giardiasis,
• diphtheria,
• competition,
• recording_sound,
• dirt,
• illness,
• bacteria,
• alcohol,
• intention,
• hookworm,
• fighting,
• combustible_rag,
• rain,
• dust,
• giardia,
• fungi,
• gonorrhoea,
• blaster_worm,
• sls,
• meat,
• beholder,
• chloroform,
• centipede,
• crack,
• dog_droppings,
• seat_adjuster,
• ear_infection,
• caulk,
• microbe,
• jealousy,
• polio,
• soap_scum,
• vindictiveness,
• hatred,
• toxic_petrochemical,
• dust_mite,
• nitrate,
• pus,
• diabetes,
• hiv,
• acetylene,
• urine,
• stuff,
• insecticide,
• tapeworm,
• deposition,
• car_crash,
• blast_weapon,
• hospital_waste,
• grasshopper,
• dead_squirrel,
• tb,
• mycoplasma,
• infection,
• kidney_infection,
• slavery,
• quantum_fluctuation,
• beeswax,
• staff,
• damp_patch,
• aphid,
• pointer,
• parvo_germ,
• ant,
• tick,
• cyanide,
• roach,
• human_skin,
• hot_sun,
• typhus,
• snow,
• roundworm,
• termite,
• dangerous_radioisotope,
• cheetah,
• command,
• gasoline,
• fascism,
• methyl_chloride,
• toxic_metal,
• venomous_frog,
• biting_bug,
• glycerin,
• despair,
• dragon,
• german_roach,
• gangrene,
• lye,
• sadness,
• mesothelioma,
• slider,
• dog,
• insurance_cover,
• anger,
• leptospirosis,
• silicon,
• mycobacterium,
• alkali,
• dung,
• salmonella,
• bird_droppings,
• old_sock,
• description,
• flashing,
• amoebic_dysentery,
• ethnic_conflict,
• meningitis,
• organs,
• time-bomb_dust,
• feather_mite,
• fox,
• perchlorate,
• influenza,
• rickets,
• muscular_dystrophy,
• flan,
• rodent,
• leprosy,
• asbestos,
• mite,
• water,
• innovation,
• venomous_snake,
• crippling_injury,
• dot,
• toluene,
• mouse,
• coating,