choke·bore 
(chōkbôr′)
(chōkbôr′)n.
1. A shotgun bore that narrows toward the muzzle to prevent wide scattering of the shot.
2. A gun with a narrowed bore near the muzzle.
- double bind
- double blind
- double-blind
- double boiler
- double bond
- double-book
- double-breasted
- double check
- double-check
- double chin
- double-click
- double coconut
- double-cross
- double-crosser
- double dactyl
- double dagger
- double date
- double-date
- Doubleday
- double-dealer
- double-dealing
- double-decker
- double-digit
- double digits
- double-dip