Buck up
Buck up verb - To become glad or hopeful.
Light up
Light up verb - Start to burn with a bright flame.
Cite this Source
Light up and Buck up. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/buck_up/light_up
Buck up & Light up. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/buck_up/light_up>.
Light up or Buck up. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/buck_up/light_up.
Google Ngram Viewer shows how "buck up" and "light up" have occurred on timeline