Source data in PHP or MYSQL?

I’m developing a web app, which involves a simple flash front-end working with random elements pulled from word lists, each between 500 to 2000 words, (about 10 lists). Part of the plan is to feed randomized selections of words to the flash interface via php. In terms of traffic load and speed would it be better to select the words from mysql tables or have the lists ‘hard-coded’ into the php file? I’d like to make it as heavy traffic proof and as fast as possible.

Any advice much appreciated!