archchaplain
/ˈɑːr.tʃæp.ˈleɪn/ or /ˈɑːr.tʃ.tʃæp.ˈleɪn/Definitions
1. noun
A high-ranking clergyman, typically the head of the chaplains or a senior chaplain of a cathedral or collegiate church.
“The archchaplain oversaw the training of new chaplains for the cathedral.”