Top:Reference:Thesauri

• WordNet - on-line lexical reference where English nouns, verbs, adjectives and adverbs are organized into synonym sets, each representing one underlying lexical concept.

• ARTFL Project: ROGET Form
• Astronomy Thesaurus - astronomy terms in English, French, German, Spanish and Italian; all terms cross referenced.
• LC Thesaurus for Graphic Material - LCTGM; body of terms for subject indexing of pictures, particularly large general collections of historical images which are found in many libraries, historical societies, archives, and museums.
• Roget's Thesaurus (2)
• Index - Web Thesaurus Compendium