For certain
For certain adverb - Definitely or positively (`sure' is sometimes used informally for `surely').
Vigilantly and for certain are semantically related. In some cases you can use "Vigilantly" instead an adverb phrase "For certain".
Vigilantly
Vigilantly adverb - In a watchful manner.
For certain and vigilantly are semantically related. Sometimes you can use "For certain" instead an adverb "Vigilantly".
Cite this Source
Vigilantly and For certain. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/for_certain/vigilantly
For certain & Vigilantly. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/for_certain/vigilantly>.
Vigilantly or For certain. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/for_certain/vigilantly.
Google Ngram Viewer shows how "for certain" and "vigilantly" have occurred on timeline