While I have a large vocabulary, I tend to hold back on dumping every word I know into a single post. a few colorful words are fine, but expecting a big word to do all the work for you (or multiple big words) can make prose feel antiseptic. 

"Amy had slept in her coat. It was wrinkled and smelled like an hour long workout. "

I would prefer that over...

"Amy's coat was disheveled and fetid."