The five words below form a very exclusive group.  Their relationship has nothing to do with their meanings. Can you see what is so unusual about them?

CHINTZY
FJORDS
GAWK
PLUMB
VEX

HINT:
Count the letters.

Answer:

With the exception of Q, these five words contain all the letters of the alphabet, with no repeats. 

Credit: Will Shortz
The Puzzlemaster Presents Vol. 2

Notes: 
In the original puzzle, Will gives you the initial letters of the five words and asks you to figure them out. To me, this challenge is extraordinarily difficult. It's totally out of my league. I am in awe that he could come up with this list. 

For examples of sentences using all the letters of the alphabet (in the shortest possible sentences), see the posts under PANGRAMS.