Brain Teaser Of The Day: Three Of A Kind 2

Figure out what the trio in each set have in common. As long as each answer is a six-letter plural word, ending in -s.

Example: Railroad, wild animal, music CD: TRACKS

1) Hunting dog
Compass
Scoreboard

2) Dungeon
Jewelry store
Sequence

3) Fish
Sheet music
Dieters

4) Municipal parking lot
Electric utility
Rhythm in verse

scarecrow