The words in each set have a common connection, something that bonds all three of them in some way, perhaps shared features or maybe its characteristics...and then again it could be a manifestation of common attributes.
Can you find a Commonality?
2. LIBERTY BELLES-PONY EXPRESS-RAIDERETTES
3. RATTLESNAKE-UNION JACK-JOLLY ROGER
4. A TIE-A NERVOUS STOMACH-A PIECE OF LUMBER
5. GEORGE JEFFERSON-EDITH BUNKER-MIKE STIVIC
6. THE RUBBER-A TONGUE DEPRESSOR-A ROSIN BAG
7. BUTTER-STEAK-SWISS ARMY
8. TWEEDLEDEE & TWEEDLEDUM-CASTOR & POLLUX-MINNEAPOLIS & ST PAUL