Roget's II: The New ThesaurusLists main entry words alphabetically, as in a dictionary, for quick lookup. Each entry is divided into senses, with brief definitions and a full list of synonyms for each sense. Special usages, such as slang terms, are labeled and grouped together at the end of each synonym list. Following each list is a cross-reference to a related entry in the thesaurus's unique Category Index. This index leads the reader from the starting word to dozens of others that have related or opposite meanings. 260,000 words. Thumb-indexed. Reference Book Type: Thesaurus.