The National Scrabble Association has published a set of rules for competitive Anagrams play in tournament setting.
Association football | association football | National Football League | National Register of Historic Places | Forward (association football) | National Hockey League | Goalkeeper (association football) | Defender (association football) | England national football team | National Basketball Association | National Science Foundation | National Geographic | National Trust | American Association for the Advancement of Science | National Endowment for the Arts | National Geographic Society | Association of Tennis Professionals | Argentina national football team | National Trust for Places of Historic Interest or Natural Beauty | National Park Service | National League | Australian National University | National Guard | National Geographic Channel | National Institutes of Health | American Library Association | National Guard of the United States | World Boxing Association | National Collegiate Athletic Association | United States National Research Council |