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. BUTTER..STEAK..SWISS ARMY
= 2. STATE..SALES..INCOME
= 3. WIND..STRING..PERCUSSION
= 4. FRENCH..RUSSIAN..THOUSAND ISLAND
= 5. TAB..RETURN..BACK SPACE
= 6. HARE..MOLE..GIRAFFE
= 7. BREAD & BUTTER..MIDGET GHERKIN..KOSHER DILL
= 8. DRUG..LIQUOR..HARDWARE
= 9. YELLOW..BLACK..BALTIC
= 10. CRAB..CANDY..CARAMEL