One
One adjective - Being the one or ones of a class with no other members.
Selfsame
Selfsame adjective - Being one and not another.
Cite this Source
Selfsame and One. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/one/selfsame
One & Selfsame. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/one/selfsame>.
Selfsame or One. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/one/selfsame.
Google Ngram Viewer shows how "one" and "selfsame" have occurred on timeline