Type  un???get*  to find words that
start with 'un', followed by any three
letters, then by 'get', with any ending:

    unforgettable
    unforgetful
    underget

 ?  represents a single letter
 *  represents any number of letters
    (including zero letters)

For example, the following
words are linked to dog:

canine, domestic animal,
pursue, puppy, genus Canis,
barker, dalmatian, poodle