First class and Unacceptable

Opposite meaning terms

First class noun - Mail that includes letters and postcards and packages sealed against inspection.

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Unacceptable is an antonym for first class in topics: pleasant, fine.

Unacceptable adjective - Falling short of a standard.

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First class is an antonym for unacceptable.

Nearby Word: unaccepted

Cite this Source

Unacceptable and First class. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/first_class/unacceptable

First class & Unacceptable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/first_class/unacceptable>.

Unacceptable or First class. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/first_class/unacceptable.

Google Ngram Viewer shows how "first class" and "unacceptable" have occurred on timeline