Sweetheart and 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. In some cases you can use "Significant other" instead a noun "Sweetheart", when it comes to topics like person whom another loves.

Significant other

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

Sweetheart and significant other are semantically related. You can use "Sweetheart" instead a noun phrase "Significant other".
Cite this Source
Significant other and Sweetheart. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/sweetheart/significant_other
Sweetheart & Significant other. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/sweetheart/significant_other>.
Significant other or Sweetheart. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/sweetheart/significant_other.
Google Ngram Viewer shows how "sweetheart" and "significant other" have occurred on timeline