Quiz: http://www.bbc.co.uk/skillswise/words/spelling/recognising/homophones/quiz.shtml
Quia: http://www.quia.com/pop/3311.html
Quia 2: http://www.quia.com/pop/89740.html
Jeopardy: http://www.quia.com/cb/96929.html
Puzzle 1: http://www.manythings.org/wbg/homonyms_1-jw.html
Puzzle 2: http://www.manythings.org/wbg/homonyms_2-jw.html
Puzzle 3: http://www.manythings.org/wbg/homonyms_3-jw.html
Speed Word 1: http://www.manythings.org/wbg/homonyms_1-sw.html
Speed Word 2: http://www.manythings.org/wbg/homonyms_2-sw.html
Speed Word 3: http://www.manythings.org/wbg/homonyms_3-sw.html
Word Confusion: http://www.funbrain.com/whichword/index.html
Super Match Game: http://teacher.scholastic.com/activities/adventure/grammar5.htm
Feast: http://www.quia.com/jg/66106.html
Kidsport: http://www.kidport.com/Grade4/LanguageArts/Synonyms.htm