Get words containing a specified sequence of letters (or word fragment) anywhere in the word. The word fragment can be any number of letters long and must occur in the same order that you specify anywhere in the resulting words. Naturally the word must be longer than the specified sequence. The sequence search can be used to identify words that have a common word base (or word root), and it can be used to identify semi-rhymes (word pairs that have an extra syllable on the end of one of the words e.g. mind grinding).
Make small words into bigger words. The word see might become addressee, foreseeable, or seeking.