The list of words below is made up of five categories, each category with twenty entries and having its own rule. Place 99 words in front of the 99 entries, and then, after placing the proper 100th word in front of OPERA, show where it belongs on the list. Try first the ten (easier) words given in boldface.
Word Ways: Vol. 28
, Article 15.
Available at: http://digitalcommons.butler.edu/wordways/vol28/iss2/15