Once
Once adjective - Having been such at some previous time.
Usage example: the once child star is now a lawyer in the entertainment industry
Unborn
Unborn adjective - Of a time after the present.
Both words in one sentence
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Amy is once kidnapped while pregnant because the Silence's boss thinks that her unborn child could be a Time Lord.
Source: Imperiled in Pregnancy - Angry at her mother for dying and angry that the unborn Ivy would get to live the life that she never would, she killed herself once Ivy was born.
Cite this Source
Unborn and Once. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/once/unborn
Once & Unborn. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/once/unborn>.
Unborn or Once. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/once/unborn.
Google Ngram Viewer shows how "once" and "unborn" have occurred on timeline