The words in each set have a common connection, something that bonds all three of them in some way, shared features or characteristics...a manifestation of common attributes.
Can you find a Commonality?
= 1. FRONTIERLAND-FANTASYLAND-TOMORROWLAND
= 2. SYMPHONY-BOUNTY-BUTTERFINGER
= 3. STINGER-PHOENIX-MINUTEMAN
= 4. FLOWERPOT-PINWHEEL-LADYFINGER
= 5. SITAR-DULCIMER-MANDOLIN
= 6. HERRING BONE-MOMBO-CHRISTIE
= 7. YRUI GAGARIN-ALAN SHEPARD-VIRGIL GRISSOM
= 8. A BOOK-A STOP SIGN-A RIPE STRAWBERRY
= 9. JETE-PIROUETTE-EN POINTE
= 10. JOE-MUD-JAVA