Below you'll find the complete list of words that David Foster Wallace circled in his American Heritage Dictionary. Many thanks to the Harry Ransom Center at the University of Texas-Austin for providing us with the list. (To learn more about the Ransom Center's Wallace archive, click here.)
Most words are hyperlinked to the American Heritage definition (available online via Yahoo). In a few cases, we couldn't find the definition on Yahoo, so we just left those words in bold.