If you're stuck on an Italian crossword entry looking for a word similar to respirare (fiatare, sospirare, or maybe espirare), or you're looking for another way to say amare (to love), try the Sinonimi Master. There's a list of synonyms and antonyms (contrari in Italian) organized alphabetically by the first three letters of the word. One interesting functionality of Sinonimi Master is that each word in the list of synonyms is clickable as well - leading to yet another list of potentially appropriate words.

Comments
At mid-2008 is the best on-line sinonimi site.. I checked with big companies ones, like “Virginio parole” and “Sapere”, but this one beat them in terms of elements and in the way terms are organised together.
Quite funny a personal web site can be better than multi-milionar companies sites…
I was so stuck on a homework lesson. If it wasn’t for this site. I would not have figured it out, at all. Thanks ao much!