Backup
Backup noun - A crowded mass (as of cars) that impedes or blocks movement.
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Synonyms for Backup
Fill in and backup are semantically related. In some cases you can replace term "Fill in" with "Backup", this nouns are similar.
Nearby Word: backing
Fill in
Mutual synonyms
Both terms in one sentence
- This was a problem in their early days when no one else in the band sang backup; since then either one of the guitarists will usually fill in these secondary vocal parts.
Source: Music / Anberlin -
Taken further in season 3 where the primary power source is lost and it's implied that Josh will eventually die with only the smaller backup source trying to fill in for it.
Source: Western Animation / Max Steel
Cite this Source
Fill in and Backup. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/backup/fill_in
Backup & Fill in. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/backup/fill_in>.
Fill in or Backup. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/backup/fill_in.
Google Ngram Viewer shows how "backup" and "fill in" have occurred on timeline