A History of Short Words

From the New York Times Crossword Puzzle

Words of five or fewer letters since August 15, 2006

echo

Wed, 6 Dec '06
"Hey!" ... "Hey!" ... "Hey!" ... "Hey!" ...
Mon, 25 Sep '06
Sound in a cave
Tue, 12 Sep '06
Off-the-wall response?
Wed, 6 Sep '06
Audio effect
Tue, 29 Aug '06
It's often tested by shouting "Hello!"