On one's guard
Upon one's guard is a synonym for on one's guard. In some cases you can use "Upon one's guard" instead an adjective phrase "On one's guard".
Upon one's guard
On one's guard is a synonym for upon one's guard. You can use "On one's guard" instead an adjective phrase "Upon one's guard".
Mutual synonyms
Cite this Source
Upon one's guard and On one's guard. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/on_one_s_guard/upon_one_s_guard
On one's guard & Upon one's guard. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/on_one_s_guard/upon_one_s_guard>.
Upon one's guard or On one's guard. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/on_one_s_guard/upon_one_s_guard.
