MyVocabulary.com offers 14 PREFIX puzzles with the grade level of each word marked to the right of the word beginning with a prefix. Use eight grade level words for each prefix."PRE" prefix words: Precaution - 6, Predict - 5, Predominant - 6, Prejudice-5, Premature - 8, Preoccupation - 8, Presume - 7, Prevail - 7