FOES

Set to 13 different clues across 17 published puzzles, most often “Rivals” — The New York Times, Monday, 12 November 2001.

4 letters

Every clue on record, most used first

Rivals3 times
The New York Times — Monday, 12 November 2001
Adversaries2 times
The New York Times — Sunday, 9 June 2002
Opposing sides2 times
The New York Times — Wednesday, 18 January 1995
Achilles and Hectoronce
The New York Times — Sunday, 26 July 2009
The North and the South, in the Civil Waronce
The New York Times — Monday, 6 July 2009
Nemesesonce
The New York Times — Sunday, 5 July 2009
They're not for youonce
The New York Times — Friday, 23 November 2007
They're against each otheronce
The New York Times — Friday, 28 September 2007
Enemiesonce
The New York Times — Monday, 2 July 2007
Grendel and Beowulfonce
The New York Times — Sunday, 2 April 2006
Us and them, maybeonce
The New York Times — Thursday, 19 January 2006
The Blue and the Gray, onceonce
The New York Times — Wednesday, 3 August 2005