First class
First class noun - Mail that includes letters and postcards and packages sealed against inspection.
Onto and first class are semantically related. In some cases you can use "Onto" instead an adjective phrase "First class".
Onto
First class and onto are semantically related. Sometimes you can use "First class" instead an adjective "Onto".
Both terms in one sentence
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Dirty Coward: John Jacob Astor and all the other First Class men who try to buy their way onto lifeboats.
Source: Film / Titanic (1943)
Cite this Source
Onto and First class. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/first_class/onto
First class & Onto. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/first_class/onto>.
Onto or First class. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/first_class/onto.
Google Ngram Viewer shows how "first class" and "onto" have occurred on timeline