WordNet Thesaurus

WordNet is an extensive lexical and semantic network of the English language.  In addition to synonyms it includes brief definitions and links between words other than synonym relationships.  It includes the following types of relationships:

Relationship

Meaning

Synonym

Words that have the same meaning as the word that you entered.

Antonym

Words that have the opposite meaning from the words that you entered. 

Hypernym

Things that are subcategories or subitems of the word that you entered. 

A ____ is a kind of <word you entered> [noun]

To ____ is a way to <word you entered> [verb]

Hyponym

Categories that the word you entered belong to (the opposite of a hypernym).

A <word you entered> is a kind of ____ [noun]

To <word you entered> is one way to ____ [verb]

Meronym

Something that is a part of or a member of the word that you entered.

____ is a member of <word you entered>.

____ is a part of a <word you entered>.

Holonym

Something that the word you entered is a member or part of. 

<word you entered> is a member of ____.

<word you entered> is part of a ____.