As nouns the difference between rector and deacon
is that
rector is in the Anglican Church, a cleric in charge of a parish and who owns the tithes of it while
deacon is a designated minister of charity in the early Church (see Acts 6:1-6).
As a proper noun Rector
is an English surname; derived from the German surname
Richter.
As a verb deacon is
for a choir leader to lead a hymn by speaking one or two lines at a time, which are then sung by the choir.