The federation of Egypt and Syria wasn't the only Arab federation during the period:
http://en.wikipedia.org/wiki/Federation_of_Arab_Republics
http://en.wikipedia.org/wiki/United_Arab_States
http://en.wikipedia.org/wiki/Arab_Federation.
And also,this was never realized,but could maybe be created by events:
http://en.wikipedia.org/wiki/Arab_Islamic_Republic.
http://en.wikipedia.org/wiki/Federation_of_Arab_Republics
http://en.wikipedia.org/wiki/United_Arab_States
http://en.wikipedia.org/wiki/Arab_Federation.
And also,this was never realized,but could maybe be created by events:
http://en.wikipedia.org/wiki/Arab_Islamic_Republic.