We don't have synonyms for archon yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are urchon, archeon and archin.
"1980: Hated by the archons of Athens for his fearless condemnation of municipal graft, he was hypocritically arraigned on a charge of corrupting Athenian youth. (Burgess, Earthly Powers)"
"1980: Hated by the archons of Athens for his fearless condemnation of municipal graft, he was hypocritically arraigned on a charge of corrupting Athenian youth. (Burgess, Earthly Powers)"