If you're stuck on a specific word, it's a great idea to consult a thesaurus. Maybe the synonym for “liaise” is on the tip of your tongue, and you just can’t recall it -- definitely turn to the thesaurus to find the word you’re looking for (hint: communicate and interface work well). But be careful not to overdo it -- remember that Friends episode where Joey uses a thesaurus to try and sound smart? Not the best strategy.
If you’re trying to use a thesaurus to make your menial tasks sound impressive, tread carefully. While we encourage you to find the skill behind the actual task and tout that in your bullets (for example, “filed papers” becomes “handled office organization, including preparing production paperwork and maintaining company logs”), you shouldn't use words you don't know or that you’d never say in the course of conversation. “Getting lunch for producers” should not become “regale executives with refreshments and sustenance.” That doesn’t sound like you did something impressive -- it sounds like you did something so insignificant that you’re embarrassed to call it like it is. Or that you might be crazy.
Ultimately, you need to remember to keep it simple. Use impressive verbs strategically to showcase your skills, but don't muddle your bullet points with overly complicated wording.