Backup
Backup noun - A crowded mass (as of cars) that impedes or blocks movement.
Usage example: there was the inevitable backup of travelers trying to pass through airport security
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Synonyms for Backup
Tailback and backup are semantically related. (British) In some cases you can use "Tailback" instead a noun "Backup".
Nearby Word: backing
Tailback
Tailback noun - (American football) the person who plays tailback.
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Synonyms for Tailback
Cite this Source
Tailback and Backup. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/backup/tailback
Backup & Tailback. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/backup/tailback>.
Tailback or Backup. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/backup/tailback.
Google Ngram Viewer shows how "backup" and "tailback" have occurred on timeline