pact

1 a formal agreement between two or more nations or peoples <a pact between the two small nations to defend one another in case of attack> Synonyms accord, alliance, compact, convention, covenant, treatyRelated Words entente, entente cordiale; bargain, bond, charter, concord, contract, deal, settlement, understanding; projet

2 an arrangement about action to be taken <they made a pact to meet every week at the same time> Synonyms accord, bargain, compact, contract, convention, covenant, deal, disposition, agreement, settlement, understandingRelated Words charter, treaty; binder, pledge, promise; alliance, association, entente, entente cordiale, league, partnership; acceptance, approval, assent, concurrence, consent, OK (or okay)