Synonyms and Antonyms

http://www.vocabulary.co.il/antonyms/intermediate/elementary-antonym-or-synonym/ --Game
http://www.fen.com/studentactivities/sameDiff/samediff.html --Game
http://www.arcademicskillbuilders.com/games/frog/frog.html --Antonym, Synonym, and Homonym Game.
http://www.internet4classrooms.com/skill_builders/antonyms_synonyms_language_arts_fifth_5th_grade.htm --Links to several games.
http://www.do2learn.com/games/synonymsantonyms/index.htm --puzzle games.
http://www.vocabulary.co.il/synonyms/ --Games.
http://www.vocabulary.co.il/antonyms/ --Games
http://www.firstschoolyears.com/literacy/word/other/synonyms/synonyms.htm --worksheets and a game.
http://www.kidskonnect.com/subject-index/20-language-arts/422-synonyms-a-antonyms.html --Links to many synonym and antonym resources.
http://languageartsgames.4you4free.com/antonyms.html --Links to several resources.  
http://www.mrnussbaum.com/generaltso.htm --game.
http://pbskids.org/lions/games/hopposites.html --PBS Kids game.
http://pbskids.org/lions/games/synsam.html --PBS Kids synonyms game.
http://www.bbc.co.uk/schools/magickey/adventures/code_game.shtml --synonyms game.
http://www.bbc.co.uk/schools/starship/english/wordballoons.shtml --synonyms game.
http://www.bbc.co.uk/bitesize/ks1/literacy/similar_meanings/play/ --synonyms game for young kids.
http://www.abcya.com/synonyms_antonyms.htm --throw a ball at the synonym or antonym.