Source : Webster's Revised Unabridged Dictionary (1913)

Amphictyony \Am*phic"ty*o*ny\, n.; pl. {Amphictyonies}. [Gr. ?.]
   (Grecian Hist.)
   A league of states of ancient Greece; esp. the celebrated
   confederation known as the Amphictyonic Council. Its object
   was to maintain the common interests of Greece.

Source : WordNet®

amphictyony
     n : an association of neighboring states or tribes in ancient
         Greece; established originally to defend a common
         religious center