A History of Short Words

From the New York Times Crossword Puzzle

Words of five or fewer letters since August 15, 2006

tra

Sat, 2 Dec '06
Musical syllable
Fri, 3 Nov '06
X-___ (big, in commercial names)
Tue, 24 Oct '06
La-la lead-in
Fri, 20 Oct '06
Repeated bit in a song
Sun, 15 Oct '06
Singsong syllable
Tue, 26 Sep '06
Refrain syllable
Thu, 14 Sep '06
La lead-in
Sun, 20 Aug '06
Singing syllable