The Wish List of Extremely Robust Searchiness:

1) Def.
2) Synonyms *without* slangy or obscene ones.
3) Robust collocation locator.
4) Example sentences:
a) with appropriate collocates;
b) at a good reading level.
5) Use of the following webpage:
http://www.unc.edu/~jelsas/Research/TextMiningToolkit/manual/