Free Trade Area - a grouping of cou

Free Trade Area - a grouping of countries within which tariffs and non-tariff trade barriers between the members are generally abolished but with no common trade policy toward non-member. Ex: NAFTA
Customs Unions - a group of states that have agreed to charge the same import duties as each other and usually to allow free trade between themselves.
Common Market – a group of countries imposing few or no duties on trade with one another and a common tariff on trade with other countries (this last bits is the difference between a custom union and a common market).