[1] : The Collaborative International Dictionary of English v.0.48

six \six\, a. as. six, seox, siex; akin to ofries. sex, d. zes,
   os.  ohg. sehs, g. sechs, icel., sw.,  dan. sex, goth.
   sa'ihs, lith. szeszi, russ. sheste, gael.  ir. se, w.
   chwech, l. sex, gr. ??, per. shesh, skr. shash. root304.
   cf. hexagon, hexameter, samite, senary, sextant,
   sice.
   one more than five; twice three; as, six yards.
   1913 webster

   six nations ethnol., a confederation of north american
      indians formed by the union of the tuscaroras and the five
      nations.

   six points circle. geom. see nine points circle, under
      nine.
      1913 webster
see also:
hexagon hexameter samite senary sextant sice 
six nations six points circle nine points circle nine 

[2] : WordNet (r) 2.0

six nations
     n : a league of iroquois tribes including originally the mohawk,
         oneida, onondaga, cayuga and seneca the five nations;
         after 1722 they were joined by the tuscarora the six
         nations syn: iroquois league, league of iroquois, five
         nations
see also:
iroquois league league of iroquois five nations 

Six Nations >> S Words
Six Nations, definition of term: Six Nations
six+nations_pag1.html

Six >> S Words
Six, definition of term: Six
six_pag1.html

Deep Six >> D Words
Deep Six, definition of term: Deep Six
deep+six_pag1.html

United Nations >> U Words
United Nations, definition of term: United Nations
united+nations_pag1.html

Six Day War >> S Words
Six Day War, definition of term: Six Day War
six+day+war_pag1.html

Law Of Nations >> L Words
Law Of Nations, definition of term: Law Of Nations
law+of+nations_pag1.html