Simple categories matching unnecessary:

• medication,
• treatment,
• procedure,
• exertion,
• misconception,
• task,
• activity,
• therapy,
• test,
• intervention,
• service,
• measure,
• stuff,
• thing,
• surgery,
• radiation,
• interference,
• expense,
• practice,
• information,
• toy,

Members with property unnecessary:

• radiation,
• diagnostic_biopsy,
• biopsy,
• lumpectomy,
• antibiotic,
• meal_preparation,
• endodontic_treatment,
• chemotherapy,
• root-canal_therapy,
• sodium,
• hysterectomy,
• gastrointestinal_endoscopy,
• stationery,
• steroid_therapy,
• facelift,
• radiotherapy,
• toner,
• drug_administration,
• special_feature,
• old_newspaper,
• diagnostic_arthroscopy,
• court,
• treatment,
• endoscopy,
• dancing_doll,
• jet_fighter,
• physical_testing,
• tissue_biopsy,
• gas-pressure_test,
• extra_petrol,
• transport,
• wound_debridement,
• orchiectomy,
• injection,
• surgery,
• rhinoplasty,
• physical_therapy,
• repeated_endoscopy,
• hospitalization,
• cone_biopsy,
• enema,
• induction,
• straw,
• cholecystectomy,
• advertising,
• dance,
• surgical_intervention,
• amputation,
• cracker,
• spare_wheel,
• defense,
• platelet_transfusion,
• jury_expense,
• handicraft,
• lung_surgery,
• consequent_biopsy,
• tonsillectomy,
• merger_review,
• laboratory_test,
• cookie,
• ultrasound,
• leakage_radiation,
• preventable_hospitalization,
• surgical_biopsy,
• rite,
• aggressive_surgery,
• battery,
• steroid_administration,
• terminal_service,
• urgent_care,
• weapon,
• memory_block,
• liposuction,
• excessive_drinking,
• simple_drawing,
• bonnet,
• mastectomy,
• ct_scan,
• back_surgery,
• error_correction,
• unnecessary_hysterectomy,
• gossip,
• hardware_test,
• lab_work,
• trailer,
• stimulant_medication,
• emergency_care,
• behavioral_therapy,
• idea,
• exercise,
• bathing_baby,
• measurement,
• digestion,
• waiting_period,
• small_break,
• vigorous_exercise,
• printing,
• steroid_treatment,
• painful_surgery,
• magazine,
• discontinuation,
• liver_biopsy,
• housework,
• decree,
• curettage,
• therapy,
• iron_administration,
• radical_surgery,
• testicular_biopsy,
• exploratory_surgery,
• statistics_calculation,
• floppy_check,