Be left
Keep up
Keep up verb - To continue to operate or to meet one's needs.
Mutual synonyms
Both terms in one sentence
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While Numbuh Two of Codename: Kids Next Door manages to keep up with the rest of his team of kid badasses fairly well, he's the most likely of the Five-Man Band to be left out of the direct action and the most easy-going of the main male characters.
Source: Non-Action Guy -
If the pursuer doesn't smash into the ground or a tree trying to keep up, his pilot will often be left exposed for the twin machine guns mounted on the chin turret waiting to tear him apart.
Source: Video Game / War Thunder -
Those who cannot keep up will be left behind, to watch from a distance.
Source: New Era Speech
Cite this Source
Keep up and Be left. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/be_left/keep_up
Be left & Keep up. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/be_left/keep_up>.
Keep up or Be left. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/be_left/keep_up.
Google Ngram Viewer shows how "be left" and "keep up" have occurred on timeline