Backup
Spare
Spare noun - An interchangeable part or piece of equipment that is kept on hand for replacement of an original.
Usage example: we promptly replaced the burnt-out lightbulb with a spare
Backup is a synonym for spare in extra topic. You can use "Backup" instead the word "Spare" as an adjective or a noun, if it concerns topics such as switch.
Mutual synonyms
Both words in one sentence
- It first came up Minionbot briefly converted to Zen in an early arc but changed his mind when Carl threatened to overwrite his backup disc with MP3s, he later got a set of spare heads in case of Logic Bomb.
Source: Body Backup Drive -
Post-Knightfall he goes so far as to set up a dozen duplicate Batcaves all over Gotham, each stocked with everything from a backup database to spare vehicles.
Source: Hidden Supplies -
All There in the Manual: Supplemental materials explain that most midsize or larger spaceships have an emergency backup hyperdrive which serves basically the same purpose as a spare tire on a car.
Source: Film / The Empire Strikes Back
Cite this Source
Spare and Backup. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/backup/spare
Backup & Spare. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/backup/spare>.
Spare or Backup. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/backup/spare.
Google Ngram Viewer shows how "backup" and "spare" have occurred on timeline