program for finding Antonyms

[QueBert]

I use Wordweb, it's a small easy to use dictionary app, it does Synonyms & anagrams. But I'm looking for one that will do Antonyms, if at all possible one like this where it can open with a shortcut (like crtl+a+s) or something user definable. This is for a neighbor who is Jr High and in her class they all use notebooks.

it would be cool if it did definitions and all that other jazz in one. Program size doesn't matter, just something that can be poped up with little effort. I have looked and looked for this with no luck