Alcohol and Other Drug Thesaurus - AOD, Art and Architecture Thesaurus, ASIS Thesaurus of Information Science, Babynames Thesaurus, CAS General Subject Vocabulary Helper, Concept Space: the visual search tool for business, Eurodic Autom, Getty Thesaurus of Geographic Names, Library of Congress Classification Schedules, Library of Congress Thesauri
ANSI/NISO Z39.19 Monolingual Thesaurus Creation St, Large-Scale Controlled Vocabulary Indexing for Nam, Thesaurus Principles and Practice, Zthes: a Z39.50 Profile for Thesaurus Navigation
American Society of Indexers - Thesauri Online
Includes "Roget's International Thesaurus of English Words and Phrases" and Houghton-Mifflin's "Roget's II: The New Thesaurus," third edition.
Provides direct term search followed by hierarchical and other types of browsing. Based on a UNESCO thesaurus.
Historical Thesaurus of English
Contains the vocabulary of English from the earliest written records to the present, with known recorded dates of usage, taken from the Oxford English Dictionary.
INGRID Library Thesaurus
Allows direct term search with results hyperlinked to broader and narrower search terms. Available in English and Estonian.
Search for relationships between words and concepts that might never have occurred to you before.
A resource for writers. Enter a single word and it will return a list of phrases and sayings that are related to the word in some way. In English.
Plumb Design Visual Thesaurus
An exploration of sense relationships within the English language. By clicking on words, you follow a thread of meaning, creating a spatial map of linguistic associations.
Roget's Interactive Thesaurus
Roget's Thesaurus of English words and phrases.
Roget's International Thesaurus of English Wo
Online publication of this popular thesaurus made available by Bartleby.com.
Roget's Thesaurus - As distributed by Project
E-text of Roget's Thesaurus No. Two, which is derived from the version of Roget's Thesaurus published in 1911.
Sybrina's Phrase Thesaurus
A creative phrase tool for creative writers of any genre including college students, people just learning English, people wanting to improve their communication skills, artistic professionals and others.
WordNet - a Lexical Database for English
An on-line lexical reference system whose design is inspired by current psycholinguistic theories of human lexical memory. English nouns, verbs, adjectives and adverbs are organized into synonym sets, each representing one underlying lexical concept. Different relations link the synonym sets. From the Cognitive Science Laboratory, Princeton University
Wordsmyth Educational Dictionary-Thesaurus
Integrated english dictionary and thesaurus.