Here is one review of the book:
“Are you tired of all those boring, pedestrian, and antiquated board books for children that you are forced to read over and over again? Of course you are! That’s why creative authors like David Borgenicht are coming up with innovative board books that will keep you, the parent, from going insane. Behold the Star Trek Book of Opposites from Quirk Books.” —Neatorama.com
A pedestrian can certainly be “a person who goes or travels on foot,” but as an adjective, pedestrian means “lacking in vitality, imagination, distinction, etc.; commonplace; prosaic or dull.” Related GRE words are mundane and quotidian.
Here are some images from the book:
I figured I’d try this myself with GRE-level vocabulary:
Brinkmanship is “the technique or practice of maneuvering a dangerous situation to the limits of tolerance or safety in order to secure the greatest advantage, especially by creating diplomatic crises.”
A voluptuary is “a person whose life is devoted to the pursuit and enjoyment of luxury and sensual pleasure.”
An argot is a specialized idiomatic vocabulary peculiar to a particular class, profession or social group.
imperturbability is the state of being “incapable of being upset or agitated; not easily excited; calm.”