Simple categories matching multilateral:

• treaty,
• arrangement,
• institution,
• organization,
• agreement,
• body,
• group,
• organisation,
• system,
• force,
• agency,
• instrument,
• outfit,
• forum,
• negotiation,

Members with property multilateral:

• bilateral_agreement,
• poorer_nation,
• imf,
• paris_convention,
• wto,
• wto_accession,
• various_un,
• eu,
• council,
• un_convention,
• un,
• antarctic_treaty,
• european_commission,
• international_bank,
• unicef,
• fao,
• european-union_eu,
• nato,
• cybercrime_convention,
• commonwealth_secretariat,
• royalty,
• community,
• balkan_agreement,
• international_energy,
• star_alliance,
• uk_department,
• imo,
• ilo,
• european_parliament,
• united_nation,
• general_assembly,
• covenant,
• iaea,
• periodic_auction,
• ngo,
• dublin_convention,
• bilateral_negotiation,
• world,
• icao,
• european_council,
• arctic_council,
• palermo_convention,
• world-bank_institute,
• continued_vigilance,
• treaty,
• basel_convention,
• gatt_round,
• gat,
• ruby,
• paris_club,
• civil_society,
• hs_convention,
• united_state,
• stockholm_convention,
• world-bank_ibrd,
• un_organization,
• various_convention,
• cotonou_agreement,
• government,
• au,
• wto_process,
• commonwealth,
• european_bank,
• european-community_ec,
• treaty_reform,
• pop_convention,
• africa_union,
• organization,
• gatt,
• berne_convention,
• world-bank_ifc,
• bank,
• wto_agreement,
• south-pacific_forum,
• ibrd,
• corporation,
• international_committee,
• ifc,
• fund,
• unesco,
• trade,
• un_commission,
• british_council,
• asean,
• wto_negotiation,
• summit,
• oas,
• organisation,
• commonwealth_scheme,
• north-atlantic_treaty,
• global_fund,
• treaty_community,
• international_covenant,
• league_covenant,
• international_labor,
• block_trade,
• word_bank,
• ilo_convention,
• african_union,
• convention,
• auditing_organization,
• world_trade,
• climate-change_convention,
• interpol,