Simple categories matching voluntary:

• participation,
• association,
• grouping,
• organization,
• control,
• transport,
• society,
• institution,
• group,
• motion,
• force,
• activity,
• organisation,
• agency,
• assistance,
• option,
• service,
• alternative,
• easement,
• vessel,
• choice,
• migrant,
• unit,
• donation,
• action,
• measure,
• body,
• market,
• task,
• item,
• deposit,
• sector,
• work,
• contribution,
• endeavor,
• agreement,
• information,
• behaviour,
• behavior,
• club,
• committee,
• effort,
• project,
• school,
• system,
• abstinence,
• arrangement,
• helper,
• movement,

Members with property voluntary:

• church,
• local_police,
• charity,
• land_purchase,
• accreditation,
• club,
• age_concern,
• guide,
• home_insulation,
• family,
• consumer_association,
• community_education,
• shelter,
• teaching,
• militia_company,
• sport_club,
• local_authorities,
• help,
• woodland_trust,
• mouse-button_click,
• private_business,
• installation,
• greenhouse_challenge,
• headway,
• mouthwash,
• wildlife_research,
• cultural_alliance,
• beach_cleanup,
• peace_corp,
• vision_support,
• political_party,
• insurance_program,
• probation_service,
• cooperative,
• union,
• magistrate_association,
• church_army,
• ngo,
• social_grouping,
• civic_organization,
• social_movement,
• sorority,
• research_institute,
• religious_society,
• urine,
• guide_movement,
• metropolitan_police,
• council,
• landlord_forum,
• free_choice,
• fraternity,
• visiting-nurse_society,
• posturing,
• men_organisation,
• business,
• muslim_brotherhood,
• jewish_community,
• regulation,
• public,
• university_study,
• wrist_movement,
• beaver,
• terrace,
• tissue_donation,
• squatting,
• voluntary_union,
• quantum_foundation,
• friendly_society,
• charity_flow,
• exploration,
• arts_council,
• finger_tapping,
• home_start,
• payroll,
• environmental_organisation,
• fireman_brigade,
• wellington_city,
• environmental_care,
• soccer_league,
• church_group,
• public_information,
• heart,
• nonprofit_hospital,
• civic_society,
• combined_administration,
• assistance,
• stroke,
• pursuit,
• art,
• business_federation,
• restoration,
• snap,
• agricultural_cooperative,
• british_trust,
• league,
• charitable_association,
• individual_savings,
• prevention_initiative,
• informational_material,
• kyoto_protocol,
• strategic_alliance,
• retirement,
• community_foundation,
• society,
• training,
• south,
• cooking,
• french_interpretation,
• acquisition,
• scout_association,
• contract,
• religious_body,
• repair_work,
• business_association,
• leapfrog,
• english_nature,
• extension,
• lay_magistrate,
• pension_service,
• form,
• temperance,
• arts_organisation,
• works,
• junior_league,
• temperance_society,
• faeces,
• internship,
• sustainable_building,
• religious_denomination,
• elder_advocacy,
• establishing_safety,
• flexing_foot,
• us,
• power,
• distribution,
• folk-music_society,
• howard_league,
• main_church,
• fundamentalist_cell,
• musical_society,
• community_care,
• age,
• police,
• body_movement,
• library,
• savings,
• royal_association,
• subsidy,
• fasting,
• child_protection,
• woman_club,
• location,
• charitable_activity,
• social_activity,
• ad_council,
• pensioner_club,
• leisure_activity,
• search,
• minority_sector,
• overeating,
• depression_alliance,
• observer_corps,
• charitable_organisation,
• guide_association,
• labor,
• sampling,
• youth_club,
• youth_development,
• supporting_people,
• research,
• promise,
• industry_accreditation,
• domestic_mission,
• sterilisation,
• gardening_club,
• professional_society,
• wave,
• peer_support,
• third_sector,
• religion,
• library_company,
• bahai_faith,
• civic_club,
• size,
• cigarette_smoking,
• literary_club,
• speech,
• governmental_agency,
• organisational_work,
• young_mind,
• voluntary_action,
• partnership,
• exercise,
• tool,
• civic_pride,
• catholic_charity,
• symphony_league,
• neighbourhood_watch,
• procurement_requirement,
• mediation_network,
• policy_work,
• alcoholics-anonymous_aa,
• routine_doctor,
• promotional_campaign,
• bridge_club,
• work,
• matthew_trust,
• chest_heart,
• national_trust,
• culture,
• environmental_project,
• rehabilitation,
• family_trip,
• rotary_club,
• lateral_move,
• pool,
• private_investment,
• audit,
• refugee_council,
• bunko,
• rural_society,
• trade_association,
• pip_project,
• simon_community,
• ethnic_association,
• merchant_guild,
• meeting_room,
• muscular_movement,
• skeletal_muscle,
• international_charity,
• reading,
• recycling,
• market,
• outreach,
• playing_sport,
• dysphasia_support,
• insurer,
• craft_board,
• alcohol_concern,
• stroke_foundation,
• workshop,
• sport_association,
• cultural_organization,
• sex_composition,
• enuresis,
• ftc,
• conservation_agreement,
• repayment_option,
• energy_star,
• monday,
• personality_development,
• sport_coaching,
• social_service,
• village,
• asthma_society,
• flexion,
• field_research,
• accrediting_agency,
• route_planning,
• academy,
• enjoying_work,
• mind,
• alzheimers_concern,
• sporting_club,
• branch,
• community_fund,
• cleanup_activity,
• participation,
• head,
• resident_association,
• community_organisation,
• home_guard,
• prevention_service,
• support,
• fraternal_order,
• preparation,
• parochial_school,
• neighborhood_organization,
• writer_club,
• recreation_program,
• deformation,
• sporting_work,
• refugee_forum,
• neighborhood_association,
• motor_task,
• trust,
• energy,
• industry_target,
• class,
• funeral_funds,
• skydiving,
• local_community,
• gambling,
• labor_school,
• legacy,
• gait,
• dieting,
• stroke_association,
• support_service,
• fire,
• college_board,
• mechanics_institute,
• conservation_project,
• artist_association,
• window_display,
• document,
• motor_preparation,
• dancing,
• negotiation,
• administration,
• rate_offering,
• peer_production,
• monitoring,
• community_safety,
• benefit_agency,
• beacon_partnership,
• smoking,
• formal_study,
• community_work,
• home_isolation,
• lady_group,
• sin,
• public_education,
• diet,
• prince_trust,
• painting,
• wildlife_trust,
• crossroads_mission,
• drug_education,
• health_authorities,
• neck_movement,
• voluntary_agreement,
• drinking,
• neighbourhood_association,
• afforestation,
• choir,
• land,
• red,
• welfare_league,
• scottish_federation,
• toothpaste,
• youth_work,
• mediation,
• insurance,
• meal_preparation,
• cricket_club,
• compliance_committee,
• dramatics_society,
• educational_organization,
• ilo,
• na_branch,
• friendship_association,
• hunting_club,
• community,
• health_service,
• city,
• pugin_society,
• writing,
• heartbeat,
• childcare,
• business_migrant,
• sport,
• accidental_death,
• brochure,
• charity_people,
• impulse_control,
• life,
• charitable_trust,
• toolbox_approach,
• acting,
• survey,
• life_education,
• credit_life,
• conservation_easement,
• wire,
• organisation,
• arts,
• charitable_agency,
• religious_organization,
• drawing,
• soccer_coaching,
• auxiliary_nursing,
• community_advertising,
• private_industry,
• incentive,
• sufi_order,
• guild,
• advocacy,
• recruitment_program,
• batsman_stroke,
• stewardship_agreement,
• charity_organisation,
• salvation,
• employer_association,
• social_marketing,
• skiing,
• locomotion,
• community_council,
• crossroads,
• recreational_boat,
• hobby,
• reading_literature,
• conservation,
• email_suggestion,
• urban_ministry,
• pruning,
• national_association,
• village_society,
• visual_attention,
• neighbourhood,
• hospital_work,
• public_agency,
• label,
• information_campaign,
• heart_foundation,
• nsf,
• nra,
• recreational_craft,
• survey_information,
• rand_corporation,
• leg_movement,
• mastication,
• methane_market,
• tree_planting,
• waste,
• consumer_union,
• firm,
• craft,
• social_group,
• help_aged,
• cv,
• care,
• voluntary_hospital,
• victim_support,
• rotary_foundation,
• head_banging,
• cc,
• technology_exchange,
• life_drawing,
• alzheimers_society,
• national_society,
• mental_health,
• pollution_prevention,
• pacing,
• emotional_response,
• school,
• preschool,
• court_visit,
• mediation_board,
• soccer_club,
• university,
• head_movement,
• auxiliary_police,
• movement,
• home_help,
• country_land,
• welfare_organisation,
• motor_speed,
• sierra_club,
• filtering_product,
• covenant,
• swimming,
• labour_union,
• social_club,
• environment_agency,
• hobby_club,
• leg,
• lunch_club,
• celebration,
• restoration_project,
• positive_steps,
• legs,
• residential_home,
• royal_project,
• hope_foundation,
• babysitting,
• community_organization,
• historical_society,
• local_business,
• conservation_covenant,
• family_service,
• cancer_research,
• hometown_organization,
• special_school,
• sport_league,
• self_monitoring,
• philosophical_society,
• medical_checkup,
• disability_service,
• football_club,
• canteen_duty,
• charitable_donation,
• youth_organisation,
• education,
• blood,
• movement_preparation,
• foundation,
• blue,
• pill,
• unicef,
• luncheon_club,
• hospital,
• mutual_society,
• faith_church,
• advocacy_alliance,
• patient_transport,
• partnership_agreement,
• iga,
• gardening,
• toddler_group,
• maintenance,
• music,
• fraternal_organization,
• general_community,
• bladder_function,
• planning,
• camp_fire,
• voluntary_work,
• infamous_gestapo,
• nature_preservation,
• prison,
• assessment_test,
• housing_association,
• football,
• social_work,
• corporation,
• cultural_association,
• move,
• hull_house,
• organized_labor,
• brownie,
• executive_function,
• cooking_club,
• primate_conservation,
• clothing_collection,