Synonymy is a non-profit, educational word game narrated by Richard Dawkins where players are challenged to find a path between random words through their network of synonyms. By taking the synonym of a word, and then a synonym of that synonym, and so on, you can ultimately arrive at any other word in a language.
Only keys listed as "Region Free" can be redeemed in any country.
EU Keys can only be redeemed within the EU.
US Keys can only be redeemed within the USA.