More Writing Software
Another good writing program is WordWeb. I am running version 5.51, and it's a great aid when you need a word, or think of a similar word, but it's not quite what you needed. There is a free version available: http://wordweb.info/free/
The free version WordWeb includes definitions, synonyms, related words, and even pronunciations.
After you use the program a while, you may consider moving up to WordWeb Pro for a small fee to gain multiple extra features like more words, editable database, add your own words.