True
True verb - Make level, square, balanced, or concentric.
Tune up
Cite this Source
Tune up and True. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/true/tune_up
True & Tune up. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/true/tune_up>.
Tune up or True. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/true/tune_up.
Google Ngram Viewer shows how "true" and "tune up" have occurred on timeline