treaty
noun
[ ˈtriːti ]
• a formally concluded and ratified agreement between states.
Similar:
agreement,
settlement,
pact,
deal,
entente,
concordat,
accord,
concord,
protocol,
compact,
convention,
contract,
covenant,
bargain,
pledge,
armistice,
truce,
alliance,
Origin:
late Middle English: from Old French traite, from Latin tractatus ‘treatise’ (see tractate).