A History of Short Words

From the New York Times Crossword Puzzle

UMP

Thu, 18 Nov '21
One crying foul, say
Wed, 3 Nov '21
Ball caller
Mon, 1 Nov '21
One who cries "Yer out!"
Tue, 7 Sep '21
Official with a protective vest
Thu, 8 Jul '21
Strike caller
Sat, 1 May '21
One whose business is home-based?
Sun, 17 Jan '21
One whose calling is making calls?