A History of Short Words

From the New York Times Crossword Puzzle

HYDRA

Fri, 23 May '25
Monster slain in one of Hercules' 12 labors
Tue, 13 May '25
Many-headed monster of myth
Fri, 9 Sep '22
Many-headed monster
Sat, 20 Aug '22
Enemy organization in Marvel Comics
Sat, 9 Jan '21
Sea serpent in the night sky