Significant other and Sweetheart

Significant other

Significant other noun - The person to whom another is married.

Sweetheart and significant other are semantically related In some cases you can use "Sweetheart" instead a noun phrase "Significant other".

Sweetheart

Sweetheart noun - A person with whom one is in love.
Usage example: I married my high-school sweetheart as soon as we both finished college

Significant other and sweetheart are semantically related in girlfriend topic. You can use "Significant other" instead a noun "Sweetheart", if it concerns topics such as person whom another loves.
Cite this Source
Sweetheart and Significant other. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/significant_other/sweetheart
Significant other & Sweetheart. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/significant_other/sweetheart>.
Sweetheart or Significant other. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/significant_other/sweetheart.
Google Ngram Viewer shows how "significant other" and "sweetheart" have occurred on timeline