answer:There are several online dictionaries of technical terms. I used to used them regularly while working in the field. Let me see if I can remember any names. There’s also Newton’s Telecom, which definitely exists offline. [Edit] Ok, here’s one list. Here’s some more. FOLDOC is one I used to use a lot. When you call for a thesaurus or list of synonyms, what kind of thing, specifically, are you going after that you can’t find in a dictionary or glossary? In a technical context it is usually better not to go in for a lot of synonyms but rather to stick to the “one term – one concept” rule to maintain clarity and avoid ambiguity. This is especially important when you are writing for translation or for an ESL audience and when you want your content to be searchable electronically. When you use a variety of terms for the same thing, you don’t get the high frequency that characterizes key terms.