Uppercase letter
Upper case and uppercase letter are semantically related. In some cases you can use "Upper case" instead a noun "Uppercase letter".
Upper case
Uppercase letter and upper case are semantically related. You can use "Uppercase letter" instead a noun phrase "Upper case".
Mutual synonyms
Cite this Source
Upper case and Uppercase letter. (2017). Retrieved 2026, July 31, from https://thesaurus.plus/related/uppercase_letter/upper_case
Uppercase letter & Upper case. N.p., 2017. Web. 31 Jul. 2026. <https://thesaurus.plus/related/uppercase_letter/upper_case>.
Upper case or Uppercase letter. 2017. Accessed July 31, 2026. https://thesaurus.plus/related/uppercase_letter/upper_case.
Google Ngram Viewer shows how "uppercase letter" and "upper case" have occurred on timeline