Nose, Toe, Eyelash, Forehead
Toe - All others are part of the face
Tennis, Swimming, Rugby, Football
Swimming - All others are sport played with a ball
Eagle, Hawk, Sparrow, Kangaroo
Kangaroo - All the others are birds
Fahrenheit, Celsius, Kelvin, Inch
Inch - All the others are units of temperature
John Lennon, Paul McCartney, Billy Joel, George Harrison
Billy Joel - All the others are members of The Beatles
