Since when is thesaurus.com so unhelpful? It used to give LOTS of synonyms for words and now it's 1 or even 0.

As a student, I frequently use thesaurus.com when I simply can't think of a word for a newspaper article or essay. Lately, the website gives only a minimal number of synonyms for words, and sometimes none at all (i just looked up synonyms for collaborate and got zero). Is there another link I have to click on or another version to download so that thesaurus won't, well, suck as bad (for lack of a better phrase)? Or, does anyone know of another site that would be more helpful? SO FRUSTRATED! Thanks.