Deepen
Deepen verb - To make markedly greater in measure or degree.
Usage example: this book really deepens our knowledge of how the brain works
Expand is a synonym for deepen in make more intense topic. In some cases you can use "Expand" instead a verb "Deepen", when it comes to topics like make depth greater.
Expand
Expand verb - To express more fully and in greater detail.
Mutual synonyms
Common collocations
Cite this Source
Expand and Deepen. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deepen/expand
Deepen & Expand. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deepen/expand>.
Expand or Deepen. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deepen/expand.
Google Ngram Viewer shows how "deepen" and "expand" have occurred on timeline