From Longman Dictionary of Contemporary Englishinterrelationshipin‧ter‧re‧la‧tionship /ˌɪntərɪˈleɪʃənʃɪp/ (also interrelation /-rɪˈleɪʃən/) noun [countable, uncountable] CONNECTED WITHa connection between two things that makes them affect each other
Examples from the Corpus
interrelationship• the interrelationship of the world economy 