As nouns the difference between behavior and action

 is that behavior is (uncountable) human conduct relative to social norms while action is something done so as to accomplish a purpose. 

As an interjection action is

 demanding or signifying the start of something, usually an act or scene of a theatric performance. 

As a verb action is

 (management) to act on a request etc, in order to put it into effect

action 和behavior的区别