Concern
Concern verb - To have (something) as a subject matter.
Hum
Hum verb - To be copiously supplied.
Cite this Source
Hum and Concern. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/concern/hum
Concern & Hum. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/concern/hum>.
Hum or Concern. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/concern/hum.
Google Ngram Viewer shows how "concern" and "hum" have occurred on timeline