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"Backup" vs "back up"

Both "back up" and "backup" are correct, but they are used in different contexts. "Back up" is a phrasal verb meaning to move backward or to support, while "backup" is a noun or adjective referring to a reserve or support. The choice between the two depends on whether you are using it as a verb or a noun/adjective.

Last Updated: March 31, 2024

Backup

This is a correct noun or adjective used to refer to a reserve or support.

Use "backup" when referring to a reserve or support system. It is commonly used in technology, business, and everyday contexts.

Examples:

  • Make sure you have a backup plan in case of emergencies.
  • I need to create a backup of my important files.
  • The backup generator kicked in when the power went out.
  • We have a backup team in case the main players get injured.
  • Do you have a backup copy of the document?

Alternatives:

  • reserve
  • support system
  • fallback
  • spare
  • substitute

back up

This is a correct phrasal verb used to indicate moving backward or providing support.

Use "back up" when you want to express the action of moving backward or providing support. It is commonly used in both literal and figurative contexts.

Examples:

  • Can you back up a little bit so I can see?
  • I need you to back up your claims with evidence.
  • The traffic is backed up for miles.
  • She always has my back and backs me up in tough situations.
  • The computer system automatically backs up your files.

Alternatives:

  • move back
  • support
  • stand behind
  • reinforce
  • reverse

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