Harden
Subjoin
Subjoin verb - To join (something) to a mass, quantity, or number so as to bring about an overall increase.
Harden and subjoin are semantically related. Sometimes you can use "Harden" instead a verb "Subjoin".
Nearby Word: subjoining
Cite this Source
Subjoin and Harden. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/harden/subjoin
Harden & Subjoin. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/harden/subjoin>.
Subjoin or Harden. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/harden/subjoin.
Google Ngram Viewer shows how "harden" and "subjoin" have occurred on timeline