The Visual Thesaurus

When you are searching for different synonyms of a word, a thesaurus is often of a great help. 

The Visual Thesaurus is an interactive tool that allows you to discover the connections between words in a visually captivating display.

http://www.visualthesaurus.com/
 
Word maps let you search for just the right word and then explore related concepts, revealing the way words and meanings relate to each other. It's a word-lover's delight, with more than 145,000 words and 115,000 meanings organized in an innovative and intuitive design.

Note: you can use it free of charge but you have to reload the free test page if you want to continue to use it without subscription.