Highest
Highest adjective - Coming before all others in importance.
Usage example: the highest official in the land
Number one and highest are semantically related. In some cases you can use "Number one" instead an adjective "Highest".
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
Highest and number one are semantically related. Sometimes you can use "Highest" instead an adjective phrase "Number one".
Mutual synonyms
Both terms in one sentence
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She became the first female to have an MTV Unplugged album to debut at number one and the highest since Nirvana in 1994.Keys made guest appearances on several television series in the following years, beginning with Charmed.
Source: Music / Alicia Keys - And he was by far the strongest of them, because when he was a warrior, he had the highest rank in his generation, the number one.
Cite this Source
Number one and Highest. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/highest/number_one
Highest & Number one. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/highest/number_one>.
Number one or Highest. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/highest/number_one.
Google Ngram Viewer shows how "highest" and "number one" have occurred on timeline