backslider
— Noun
– English
～ someone who lapses into previous undesirable patterns of behavior
backsliding
— Noun
– English
～ a failure to maintain a higher state
backspace
— Noun
– English
～ the typewriter key used for back spacing
backspacer
— Noun
– English
～ the typewriter key used for back spacing
backspin
— Noun
– English
～ spin (usually of a moving ball) that retards or reverses the forward motion
backstage
— Noun
– English
～ a stage area out of sight of the audience
backstairs
— Noun
– English
～ a second staircase at the rear of a building
backstay
— Noun
– English
～ a stay that supports the back of something
backstitch
— Noun
– English
～ an overlapping stitch made by starting the next stitch at the middle of the preceding one
backstop
— Noun
– English
～ (baseball) the person who plays the position of catcher
backstop
— Noun
– English
～ (baseball) a fence or screen (as behind home plate) to prevent the ball from traveling out of the playing field
backstop
— Noun
– English
～ a precaution in case of an emergency; "he acted as a backstop in case anything went wrong"
backstroke
— Noun
– English
～ a swimming stroke that resembles the crawl except the swimmer lies on his or her back
backstroker
— Noun
– English
～ someone who swims the backstroke
backswimmer
— Noun
– English
～ predaceous aquatic insect that swims on its back and may inflict painful bites
backsword
— Noun
– English
～ a stick used instead of a sword for fencing
backsword
— Noun
– English
～ a sword with only one cutting edge
backtalk
— Noun
– English
～ an impudent or insolent rejoinder; "don't give me any of your sass"
backup
— Noun
– English
～ a musical part (vocal or instrumental) that supports or provides background for other musical parts
backup
— Noun
– English
～ someone who takes the place of another (as when things get dangerous or difficult); "the star had a stand-in for dangerous scenes"; "we need extra employees for summer fill-ins"