The * wildcard matches any number of characters: http://www.wordnik.com/search/*tacular? matches any single character: http://www.wordnik.com/search/f?tOr you can limit single-character wildcards to just vowels or just consonants with @ and # respectively: http:[email protected] http://www.wordnik.com/search/#at
Searching without wildcards returns results similar to what you see from autocomplete, but includes results from lists, tags, and related words:
Or you can specifically focus on lists and see more results:
FYI: I call Wordnik a meta-dictionary becuase it has quite a few details in common with search engines. It doesn't just have a list of definitions. It also searches the web to find words and track how they're used. As new uses are identified they are added to the dictionary.