| Interface | Description | 
|---|---|
| Dictionary | A simple interface representing a Dictionary. | 
| StringDistance | Interface for string distances. | 
| TermFreqIterator | Interface for enumerating term,weight pairs. | 
| Class | Description | 
|---|---|
| HighFrequencyDictionary | HighFrequencyDictionary: terms taken from the given field
 of a Lucene index, which appear in a number of documents
 above a given threshold. | 
| JaroWinklerDistance | Similarity measure for short strings such as person names. | 
| LevensteinDistance | Levenstein edit distance class. | 
| LuceneDictionary | Lucene Dictionary: terms taken from the given field
 of a Lucene index. | 
| NGramDistance | N-Gram version of edit distance based on paper by Grzegorz Kondrak, 
 "N-gram similarity and distance". | 
| PlainTextDictionary | Dictionary represented by a text file. | 
| SpellChecker | 
   Spell Checker class  (Main class)  (initially inspired by the David Spencer code). | 
| SuggestWord | SuggestWord, used in suggestSimilar method in SpellChecker class. | 
| SuggestWordFrequencyComparator | Frequency first, then score. | 
| SuggestWordQueue | Sorts SuggestWord instances | 
| SuggestWordScoreComparator | Score first, then frequency | 
| TermFreqIterator.TermFreqIteratorWrapper | Wraps a BytesRefIterator as a TermFreqIterator, with all weights
 set to  1 | 
| Enum | Description | 
|---|---|
| SuggestMode | Set of strategies for suggesting related terms |