Every writer inevitably hits that wall where he/she knows there is a word for something, but can’t remember what the word is.
Enter OneLook, the reverse dictionary. You give it a definition, and it gives you possible words.
It’s no where near perfect, but it can help.
OneLook was brought to my attention via my buddy and frequent commenter pochp.
The Geek Whisperer 
I’m glad you found it useful buddy.
Because like so many other good products I endorse,
I haven’t tried it yet! LOL No joke.
That’s too funny.
It’s not amazing, but every once in a while when I am grasping for a word and can’t think of it, the site helps.