A History of Short Words

From the New York Times Crossword Puzzle

LOO

Sat, 27 Nov '21
Head of Hogwarts?
Thu, 14 Oct '21
Head across the pond?
Sat, 17 Apr '21
Head across the pond
Sun, 11 Apr '21
A head
Tue, 6 Apr '21
Facilities in England
Wed, 3 Feb '21
Can, in Canterbury
Tue, 5 Jan '21
Head of England?