Fortify up
Strengthen and fortify up are semantically related. In some cases you can use "Strengthen" instead a verb phrase "Fortify up".
Strengthen
Strengthen verb - To increase the ability of (as a muscle) to exert physical force.
Fortify up and strengthen are semantically related. You can use "Fortify up" instead a verb "Strengthen".
Nearby Words: strength, strengthening
Cite this Source
Strengthen and Fortify up. (2017). Retrieved 2026, August 08, from https://thesaurus.plus/related/fortify_up/strengthen
Fortify up & Strengthen. N.p., 2017. Web. 08 Aug. 2026. <https://thesaurus.plus/related/fortify_up/strengthen>.
Strengthen or Fortify up. 2017. Accessed August 08, 2026. https://thesaurus.plus/related/fortify_up/strengthen.
Google Ngram Viewer shows how "fortify up" and "strengthen" have occurred on timeline