an arrangement or understanding (spoken or written) made by two or more people, governments etc

concurrence

the state of association or connection

friendly association, agreement

a group of people joined together for some common purpose

group with common interest or pursuit

the act of uniting

allied group, association

a word used to join other words, clauses etc such as and, but, because

combination

a society of men who treat each other as equals and who have the same common interests etc

brotherhood

the state of being a partner

alliance; participation

a member of the same family as another person; connection; (usually plural) dealings; affairs

connection, family connection

connection; a connection by family or marriage; an important friendship or love affair

connection; friendship