All and For certain

All

All adverb - To a full extent or degree.

For certain and all are semantically related. In some cases you can use "For certain" instead an adverb "All".

For certain

For certain adverb - Definitely or positively (`sure' is sometimes used informally for `surely').

All and for certain are semantically related. Sometimes you can use "All" instead an adverb phrase "For certain".
Cite this Source
For certain and All. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/all/for_certain
All & For certain. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/all/for_certain>.
For certain or All. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/all/for_certain.
Google Ngram Viewer shows how "all" and "for certain" have occurred on timeline