(n) backlash
(n) feedback
(P)
(n) (comp) fallback
fall-back
(n) blue backs
(n) paperback
(n) cash-back
rebate
(n) quarterback
(n) quarterback
(n) sea buckthorn (Hippophae rhamnoides)
(n) (comp) backup power supply
(n) backwater
(n) backwater
(n) (comp) back-end processing
(n) background
(P)
(n) back combing
(n) back screen (esp. hitter's background in center field) (baseball)
(P)
(n) (comp) back-scroll
(n) back straight
(n) backstretch
(n) backstroke
(n) backslash (character)
(n) backpacking
(n) (comp) backward recovery
(n) piggyback system
(n) fast back
(n) flashback
(n) (comp) full backup
(n) running back
(n) (comp) loopback test
(n) (comp) log backup