Highly
So
So adverb - To a great degree.
Usage example: it's so cold outside
Mutual synonyms
Cite this Source
So and Highly. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/highly/so
Highly & So. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/highly/so>.
So or Highly. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/highly/so.
Google Ngram Viewer shows how "highly" and "so" have occurred on timeline