Mosquito: A Natural History of Our Most Persistent and Deadly ___, 3 letters
Scratch a lover, and find a ___: Dorothy Parker, 3 letters
This is a Montague, our ___: Romeo and Juliet, 3 letters
Who goes there, friend or ___?, 3 letters
A McCoy, to a Hatfield, 3 letters
Any Hatfield, to a McCoy, 3 letters
Axis, to the Allies, 3 letters
Bizarro, to Superman, 3 letters
Bugs Moran, to Al Capone, 3 letters
Capulet, to Montague, 3 letters
Catwoman, to Batman, 3 letters
Cheyenne, to a Pawnee, 3 letters
Comrade counterpart, 3 letters
Contender for your title, 3 letters
Cornwallis, to Washington, 3 letters
Custer, to Sitting Bull, 3 letters
Dangerous answer to a sentry, 3 letters
Darius, to Alexander, 3 letters
Doc Ock, to Spider-Man, 3 letters
Doctor Octopus, to Spider-Man, 3 letters
Dr. Evil, to Austin Powers, 3 letters
End of a sentry's question, 3 letters
Enemy or competition, 3 letters
Friend's antithesis, 3 letters
Friend's counterpart, 3 letters
Goldfinger, to Bond, 3 letters
Goliath, to David, e.g., 3 letters
Grendel, to Beowulf, 3 letters
Hatfield, to a McCoy, 3 letters
He's not on your side, 3 letters
Hector, to Achilles, 3 letters
Holyfield, to Lewis, 3 letters
Hotspur, to Prince Hal, 3 letters
Iran, to Iraq for much of the 80's, 3 letters
Last word in a sentry's question, 3 letters
Mailman, to a canine?, 3 letters
Moriarty, to Holmes, 3 letters
Mr. Big, to James Bond, 3 letters
Mr. Mxyzptlk, to Superman, 3 letters
Napoleon, to Wellington, 3 letters
Newman, to Seinfeld, 3 letters
One against another, 3 letters
One in a battle scene, 3 letters
One not on your side, 3 letters
One on the opposing side, 3 letters
One on the other side, 3 letters
One to go up against, 3 letters
One who is against you, 3 letters
One who isn't behind you, 3 letters
One who isn't with us, 3 letters
Rangers, to the Islanders, e.g., 3 letters
Scarecrow, to Batman, 3 letters
Sentry's classification, 3 letters
The Germans, to the British at Jutland, 3 letters
The Green Goblin, to Spider-Man, 3 letters
The Joker, to Batman, 3 letters
The Red Skull, to Captain America, 3 letters
The Riddler, to Batman, 3 letters
Wellington. to Napoleon, 3 letters
Downslope Alpine wind that threatens climbers, 5 letters
Warm alpine wind (anagram of NO, HEF), 5 letters
Warm, dry Alpine wind, 5 letters
A warm dry wind that blows down the northern slopes of the Alps, 5 letters
An armed adversary (especially a member of an opposing military force), 6 letters
Enemies, archaically, 6 letters
Enemies, literary style, 6 letters
The New Republic editor Franklin, 4 letters
Franklin of The New Republic, 4 letters
Achilles and Hector, 4 letters
Batman and the Joker, e.g., 4 letters
David and Goliath, e.g., 4 letters
Grendel and Beowulf, 4 letters
Hatfields and McCoys, 4 letters
Hatfields and McCoys, e.g., 4 letters
Hatfields and McCoys, for example, 4 letters
Hatfields, to McCoys, 4 letters
Hutus and Tutsis, e.g., 4 letters
Jackson and Clay, e.g., 4 letters
Montagues, to Capulets, 4 letters
Montgomery and Rommel, 4 letters
North and South Korea, e.g., 4 letters
Opponents, as in the World Series, 4 letters
Opposite sides of a fight, 4 letters
Plaintiffs, to defendants, 4 letters
Sparta and Athens, e.g., 4 letters
Sparta and Thebes, e.g., 4 letters
The Blue and the Gray, 4 letters
The Blue and the Gray, once, 4 letters
The Hatfields and the McCoys, e.g., 4 letters
The North and South, in the Civil War, 4 letters
They aren't behind you, 4 letters
They aren't with you, 4 letters
They don't get along, 4 letters
They're against each other, 4 letters
They're against you, 4 letters
They're not for you, 4 letters
They're not on your side, 4 letters
They're on the other side, 4 letters
You try to beat them, 4 letters
You want to beat them, 4 letters
A distinctive odor that is offensively unpleasant, 6 letters
The branch of medicine concerned with the fetus in the uterus, 9 letters
Measurement of a fetus (especially the diameter of the head), 10 letters
A stethoscope placed on the pregnant woman's abdomen to listen for the fetal heartbeat, 10 letters