A History of Short Words

From the New York Times Crossword Puzzle

UFO

Sun, 17 Oct '21
Ship for 28-Across
Thu, 14 Oct '21
World traveler?
Thu, 4 Mar '21
Space oddity
Wed, 24 Feb '21
What Venus is sometimes mistaken for, due to its brightness
Sat, 13 Feb '21
Subject of many a conspiracy theory