A History of Short Words

From the New York Times Crossword Puzzle

POM

Mon, 15 Aug '22
Certain lap dog, informally
Sun, 29 May '22
When repeated, cheer accessory
Wed, 4 Aug '21
Certain lap dog, informally
Sat, 24 Jul '21
Certain toy, briefly
Tue, 5 Jan '21
Petite pooch, familiarly