Modifiers matching association:

• benevolent,
• voluntary,
• international,
• civic,
• visual,
• intermediate,
• informal,
• musical,
• cooperative,
• formal,
• private,
• corporate,
• political,
• contractual,
• organized,
• sexual,
• social,
• hierarchical,
• sporting,
• free,
• ordinary,
• independent,
• bureaucratic,
• mathematical,
• intimate,
• observed,
• nonprofit,
• large,
• violent,
• cultural,
• crucial,
• local,
• influential,
• secular,
• ecological,
• functional,
• indian,
• dangerous,
• autonomous,
• civilian,
• concrete,
• criminal,
• important,
• external,
• modern,
• foreign,
• industrial,
• economic,
• meaningful,
• stable,
• relevant,
• positive,
• specialized,
• legal,
• expressive,
• civil,
• primary,
• national,
• semantic,
• traditional,
• secondary,
• new,
• athletic,
• entrepreneurial,
• societal,
• permanent,
• global,
• larger,
• medical,
• spatial,
• strong,
• collaborative,
• exclusive,
• close,
• communal,
• scholarly,
• occupational,
• outside,
• affiliated,
• scientific,
• urban,
• involuntary,
• religious,

Simple categories matching voluntary:

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