backup

1. Extra; standby: a backup pilot.

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1. A reserve or substitute.

2. An overflow or accumulation caused by clogging or by a stoppage: a backup in the sink; a backup of traffic at the drawbridge.

3. Computer Science A copy of a program or file that is stored separately from the original.

4. Music A background accompaniment, as for a performer.

5. Support or backing.

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Here are some other words you could make with the letters backup, you can also
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Top Words by points	Points	Word Game
backup	16	Scrabble

2 Letters	Scrabble® Points
ab	4
ba	4
up	4
pa	4
ka	6

3 Letters	Scrabble® Points
ack	9
pub	7
pak	9
pac	7
kab	9
cup	7
cub	7
cap	7
cab	7
bap	7
auk	7

4 Letters	Scrabble® Points
kapu	10
buck	12
back	12
pack	12
puck	12

5 Letters	Scrabble® Points
pucka	13

6 Letters	Scrabble® Points
backup	16