A History of Short Words

From the New York Times Crossword Puzzle

PUP

Wed, 11 Jun '25
Young 'un
Sun, 20 Apr '25
Young boxer, say
Thu, 13 Jun '24
Mini mouse
Fri, 9 Feb '24
Baby bat
Mon, 26 Jun '23
Baby seal
Wed, 1 Mar '23
Young seal
Sun, 11 Sep '22
See 91-Across
Mon, 27 Jun '22
Baby dog
Sat, 27 Nov '21
Spot early on?