Commonalities

David Foster Wallace had a well known love for words. He kept a vocabulary list of words he found interesting and worth remembering. Murenger - wall maker; minim - tiny or insignificant portion; and so on. More here.

In another article about DFW, I ran across a quiz he gave his undergrad students.  

WIN A LUNCH WITH DAVE, SPARKLING CONVERSATIONALIST, WELL-MANNERED EATER, BY SIMPLY IDENTIFYING WHAT ALL THE FOLLOWING WORDS HAVE IN COMMON:

Foreign
Big
Diminutive
Incomprehensible
Untyped
Pulchritude
S-less
Unwritten
Indefinable
Misspelled
Vulgar
High-class
Invisible
Unvowelled
Obscene 

I love this assignment and I love the (most likely) answer.