Can you feel an urge to present a three dimensional view of your subject?
Then choose from the variety of flavours offered in here with all the million associated synonyms.
One could easily be spoiled for choice, and begin to use wonderful words that don't really mean what is meant. On the other hand, the subtle shades of sense that become possible with a wider vocabulary enable the use of greater depth and breadth to enhance one's prose.
The most exhaustive and adventurous Synonym Dict. I know. vast and alphabetical it is not for non-native speakers I should think and provides a host of weird and wonderful counterparst. Also published as 'the Synonym Finder'. O for a CD-Rom version....