Find all words in the dictionary that can be made by replacing in any word in the dictionary the search pattern with the replacement pattern. If the source word contains the pattern multiple times, then all replacement permutations of all possible numbers of replacements are checked.
Find all words in the dictionary that contain the search pattern either any number of times or a specified number of times.
Compare word by word two paragraphs with identical word counts. The results assume that no more than one character has been deleted consecutively from corresponding words between the two paragraphs.