Number one
Number one noun - The first or highest in an ordering or series.
Significant other and number one are semantically related. In some cases you can use "Significant other" instead a noun phrase "Number one".
Significant other
Significant other noun - The person to whom another is married.
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Synonyms for Significant other
Number one and significant other are semantically related. Sometimes you can use "Number one" instead a noun phrase "Significant other".
Mutual synonyms
Cite this Source
Significant other and Number one. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/number_one/significant_other
Number one & Significant other. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/number_one/significant_other>.
Significant other or Number one. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/number_one/significant_other.
Google Ngram Viewer shows how "number one" and "significant other" have occurred on timeline