interassociation

adjective

in·​ter·​as·​so·​ci·​a·​tion ˌin-tər-ə-ˌsō-sē-ˈā-shən 

-shē-

variants or inter-association

chiefly British

: occurring between or involving two or more associations

an inter-association football match/tournament

Word History

First Known Use

1881, in the meaning defined above