Master
Master adjective - Coming before all others in importance.
Usage example: thought of themselves as belonging to humanity's master race
Number one and master are semantically related In some cases you can use "Number one" instead the word "Master" as a noun or an adjective.
Number one
Number one adjective - Coming before all others in importance.
Usage example: considers international terrorism to be the number one threat to national security
Master and number one are semantically related in most important person or thing topic. You can use "Master" instead the phrase "Number one" as a noun or an adjective.
Mutual synonyms
Both terms in one sentence
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Similar to the Kenichi example above, Charanko from One-Punch Man is the number one disciple of S-class hero and master martial artist Bang.
Source: Overly Narrow Superlative -
Not only is she viciously insane, she regards herself as her master's number one servant, a position she guards jealously...which motivates her to kill Elizabeth Marks, whom she perceives as a threat to her status.
Source: Series / CSI: Cyber - They will be the number one cause of failure in the Master Fortress segment of Classic Mode.
Source: Demonic Spiders / Fighting Games
Cite this Source
Number one and Master. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/master/number_one
Master & Number one. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/master/number_one>.
Number one or Master. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/master/number_one.
Google Ngram Viewer shows how "master" and "number one" have occurred on timeline